E-heptomino

E-heptomino
b3o$2o$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
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Pattern type	Methuselah
Number of cells	7
Bounding box	4 × 3
MCPS	7
Lifespan	343 generations
Final population	52
L/I	49
F/I	7.4
F/L	0.152
L/MCPS	49
Discovered by	John Conway
Year of discovery	1970
Rules Outer-totalistic rules B3/S23 only Important rules Conway Life # of rules 20 = 1 Isotropic rules B3/S23 only
Glider synthesis Fewest gliders 3 Uploaded synthesis RLE eheptomino_synth.rle
Pattern files Plaintext eheptomino.cells RLE eheptomino.rle

E-heptomino (or E) is a semi-common heptomino named by John Conway. It stabilizes at generation 343, leaving behind four beehives, five blocks, one blinker and one escaping glider.

The following is a pattern that eventually becomes the immediate child of the E-heptomino sequence in 19 generations, putting them 18 generations apart. It has two six-cell great-great-grandparents (3bo$2b2o2$bo$2o and 2bo$2b2o2$bo$2o).

x = 4, y = 4, rule = B3/S23 3o$3bo$o2bo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 8 THUMBSIZE 2 ]]

(click above to open LifeViewer) RLE: here Plaintext: here

The following is a pattern that converges to the E-heptomino sequence, but in a completely different way. Generation 22 of this pattern is generation 12 of the E-heptomino; both are a lumps of muck and a block, but the lumps of muck form in completely different ways.

x = 5, y = 5, rule = B3/S23 2bo$bob2o$o3bo$bobo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 8 THUMBSIZE 2 ]]

(click above to open LifeViewer) RLE: here Plaintext: here

Here is E-heptomino at generation 343, stabilized except for an escaping glider:

E-heptomino at generation 343

See also

• B-heptomino
• Herschel
• F-heptomino
• I-heptomino

External links

• E-heptomino at the Life Lexicon