List of common evolutionary sequences

From LifeWiki
Jump to navigation Jump to search

In late 2016, Simon Ekström determined the most common evolutionary sequences using 8×8 random soups.[1]

To qualify on the list, a pattern must initially have 12 or fewer cells and reach 20, staying above 12 for at least four generations with different population, at some point in its evolution. For this reason, the traffic light and interchange do not qualify.

Sequence Pattern Lifespan[note 1] Occurrences Relative frequency
Honey farm predecessor
(bun shown)
x = 4, y = 3, rule = B3/S23 b2o$o2bo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
17 617733[note 2] 1.000
R-pentomino
x = 3, y = 3, rule = B3/S23 b2o$2o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
1103 531779 0.861
Pi-heptomino
x = 3, y = 3, rule = B3/S23 3o$obo$obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
173 471544 0.763
Lumps of muck
x = 4, y = 3, rule = B3/S23 2o$b2o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
63 310237 0.502
Century
x = 4, y = 3, rule = B3/S23 2b2o$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
103 266004[note 3] 0.430
B-heptomino
x = 4, y = 3, rule = B3/S23 ob2o$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
148 244984[note 4] 0.397
Wing
x = 4, y = 4, rule = B3/S23 b2o$o2bo$bobo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
104 133659 0.216
Herschel with block
(B-heptomino descendant)
x = 14, y = 4, rule = B3/S23 o11b2o$3o9b2o$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
128 121316 0.196
Teardrop
x = 4, y = 4, rule = B3/S23 b3o$o2bo$o2bo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
20 64485 0.104
I-heptomino
x = 4, y = 4, rule = B3/S23 2o$bo$b2o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
247 53177 0.086
Two-glider octomino
x = 4, y = 4, rule = B3/S23 2b2o$2b2o$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
385 50178 0.081
Long bun (object hassled in Jason's p33)
x = 5, y = 3, rule = B3/S23 bobo$o2b2o$o2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
53 48239 0.078
Procrastinator [2][3]
x = 4, y = 4, rule = B3/S23 o$3o$3bo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
73 46879 0.076
Blonk-tie
x = 3, y = 5, rule = B3/S23 2o$2o$2bo$2bo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
552 38554 0.062
Unnamed
(active region from the beginning of Iwona)
x = 5, y = 2, rule = B3/S23 ob3o$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
238 37747 0.061
U-turner[4]
x = 4, y = 4, rule = B3/S23 b3o$b3o$obo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
163 29273[note 5] 0.047
Herschel descendant hassled in period-184 glider gun,
H' (without its first natural glider)
x = 5, y = 4, rule = B3/S23 2o$o2b2o$bo2bo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
106 29196 0.047
R-turner (name unofficial[5])
x = 5, y = 4, rule = B3/S23 2b2o$4bo$o2bo$3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
268 28314 0.046
Original diehard
x = 8, y = 3, rule = B3/S23 6bo$2o$bo3b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
130 27077 0.044
Object hassled in Jason's p22
x = 6, y = 5, rule = B3/S23 2b3o$bo3bo$o4bo$bob2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
65 25303 0.041
Traffic light hitting block
(creating block and blinker)
x = 8, y = 3, rule = B3/S23 2o$2o4bo$5b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
47 24725 0.040
Dove
2b2o$bo2bo$o2bo$3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
200 23603 0.038
Unnamed (soon evolves into a pi and loaf)
(evolves from o3bo$ob3o$6bo)
x = 7, y = 4, rule = B3/S23 o2bo$bob2o$bo3b2o$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
346 22654 0.0367
Herschel (by itself)
x = 3, y = 4, rule = B3/S23 o$3o$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
128 21929[note 6] 0.0355
Butterfly
x = 4, y = 4, rule = B3/S23 o$2o$obo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
33 18593 0.0301
Octomino II
x = 4, y = 4, rule = B3/S23 bo$3o$ob2o$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
116 18507[note 7] 0.0300
Traffic light hitting block, leaving single beehive
x = 8, y = 3, rule = B3/S23 2o5bo$o4bobo$7bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
69 17795 0.0289
Traffic light hitting block, leaving two blinkers
x = 8, y = 4, rule = B3/S23 2o$2o$6bo$5b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
36 17656 0.0286
Object hassled in Karel's p177
x = 5, y = 3, rule = B3/S23 ob2o$bo2bo$2b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
153 17620 0.0285
Unnamed, dies out
x = 4, y = 4, rule = B3/S23 b3o$o2bo$o2bo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
18 17007 0.0275
Object hassled in Merzenich's p64
x = 5, y = 4, rule = B3/S23 2o$obo$2b2o$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
34 16764 0.0271
Unnamed, evolves to 7 blinkers
x = 5, y = 4, rule = B3/S23 3o$bo$bob2o$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
35 16695 0.0270
Traffic light hitting block
x = 7, y = 6, rule = B3/S23 bo$3o3$5b2o$5bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
173 16414 0.0266
A single unit in the 3c/7 wave, dies out
(evolves into U-turner descendent and a beehive)
x = 5, y = 4, rule = B3/S23 2bo$bobo$2ob2o$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
27 16361 0.0265
Traffic light hitting block
4b3o$2o3bo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
211 15854 0.0257
Clean bi-block predecessor
x = 5, y = 3, rule = B3/S23 obo$2ob2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
44 15621 0.0253
Traffic light hitting block
x = 8, y = 4, rule = B3/S23 6b2o$o5b2o$2o$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
22 15505 0.0251
Lumps of muck hitting block
x = 9, y = 3, rule = B3/S23 2o4bo$2o2b2ob2o$7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
68 15475 0.0251
Intermediate generation of octomino II
x = 7, y = 6, rule = B3/S23 2bo$bo$o4b2o$bo4bo$2b2o2bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
94 14689 0.0251
Unnamed six-cell pattern listed as 5.s.1[6]
x = 5, y = 3, rule = B3/S23 3o$4bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
49 14585 0.0236
Unnamed beehive edge-shooter[note 8]
x = 6, y = 5, rule = B3/S23 2bo2bo$bo3bo$o4bo$o$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
61 14525 0.0235
Unnamed, dies out
x = 4, y = 4, rule = B3/S23 bo$2obo$bobo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
49 14509 0.0235
Unnamed
x = 4, y = 4, rule = B3/S23 b3o$o2bo$o2bo$obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
17 13997 0.0227
Unnamed methuselah making
procrastinator and beehive
x = 5, y = 3, rule = B3/S23 b2o$bobo$o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
1675 13661 0.0221
Active region in cis-beacon on anvil predecessor
3b2o$4bo$4bo$3bo$3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
320 13484 0.0218
Unnamed; pi-heptomino hitting boat
4bo$3bobo$3obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
130 12411 0.0201
U-turner 30-generation predecessor
b3o2$4bo$o$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
193 12200 0.0197

Of the top 96, the E-heptomino ranks 53rd with 11035 occurences,[note 9] the queen bee ranks 81st (7910 occurrences), and the pulsar ranks 86th (7360 occurrences).[note 10] The F-heptomino (5154 occurences), thunderbird (6161 occurences), and switch engine (687 occurrences) do not make the top 96. The Z-hexomino ranks 146th (4675 occurrences). Other patterns of note that are more common than the switch engine include multum in parvo (3404), one of the less familiar fours, four blocks in a rectangle (1615), the sequence that forms from a row of 8 on cells (1434), a clean paperclip (1053), gliders by the dozen (855), and a clean bipond (830).

This census for small, common active regions may provide insights into finding bottlenecks for new conduits.

Common enough but not large enough

This list is more subjective, since these objects do not qualify as large enough. The number of three glider collisions and the number of octohash collisions can provide a rough estimate. These are not guaranteed to be in order of frequency.

Sequence Pattern Lifespan
Traffic light via T-tetromino
x = 3, y = 2, rule = B3/S23 3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
9
Phi spark
b2o$o2bo$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
17
Interchange
2b2o$bo2bo$o4bo$b4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
17
Two loaves
b3o$o3bo$2o$2b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
12
Two loaves
2o$obo$obo$2b2o$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
12
2G TL+G
2b2o$bobo$2obo$3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
34
Unnamed spark
2b2o$bo$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
17
Traffic light via longer sequence
2o$obo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
27
Traffic light via longer sequence
4b2o$4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
28
Fleet
3bo$b2o$obo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
13
Angel predecessor
2o2bo$obobo$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
14
Tub predecessor
3o$obo$3bo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
14
Table
4o$o2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
15
Bakery
2bo$3bo$bo2bo$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
8

See also

Notes

  1. Lifespan is measured from its canonical initial form, not from the form in the generated list.
  2. Another honey farm predecessor is listed separately with 7167 occurrences. If included, the total would be 624900.
  3. A predecessor of a first cousin of the century is listed separately with 6060 occurrences. If included, the total would be 272064.
  4. A Herschel and a block with the same relative position as from a B-heptomino are listed separately with 121316 occurrences. If included, the total would be 366300, which would put the B-heptomino in 5th place. In addition, a predecessor of a B-heptaplet (which is included in the B section in the RLE of two-glider collisions) is listed separately with 11287 occurrences. If also included, the total would be 377587 occurrences.
  5. Another predecessor is listed separately later in this list with 12200 occurrences. If included, the total would be 41473, putting it in 14th place. In addition, the object with 16361 occurrences creates a temporary one before quickly crashing into a beehive.
  6. A descendant is listed separately with 7533 occurrences. If included, the total would be 29462, which would put the Herschel in 16th place.
  7. A descendant is listed separately with 14689 occurrences. If included, the total would be 33196, which would put the Octomino II in 16th place.
  8. This pattern is more common without the blinker, but such pattern doesn't get large enough to qualify for the list.
  9. Another active region that converges to the E-sequence is listed separately with 7884 occurrences. If combined, the total would be 18919, which would put the E-sequence in 25th place.
  10. Another pulsar predecessor is listed separately with 5420 occurrences. If combined, the total would be 12780, which would put the pulsar in 46th place. However, the frequency of the pulsar overall may be overstated, as the soups used to make this list were 8×8, and pulsars are more frequent in smaller soups.

References

  1. simeks (December 28, 2016). Census of small evolving patterns (discussion thread) at the ConwayLife.com forums
  2. Robert Wainwright (December 1971). Lifeline, vol 4, page 4.
  3. MathAndCode (November 1, 2020). Small predecessors of common objects and evolutionary sequences (discussion thread) at the ConwayLife.com forums
  4. MathAndCode (May 4, 2021). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
  5. David Raucci (July 2, 2021). Re: Thread For Your Naming Proposals of Unnamed Patterns (discussion thread) at the ConwayLife.com forums
  6. Robert Wainwright (December 1971). Lifeline, vol 4, page 10.