This article is about the 36-cell period-22 oscillator. For the 22-cell period-36 oscillator, see 22P36 .
Jason's p22 (or 36P22 ) is a period-22 oscillator discovered by Jason Summers on August 27, 2000 .^{[1]} It is composed of an unnamed reaction stabilized by two copies of eater 1 . In terms of its 36 cells , it is the smallest known non-trivial period-22 oscillator, followed by p22 honey farm hassler with 40 cells and champagne glass with 45 cells .^{[2]}
It gives off sparks , which in addition to allowing for the construction of non-trivial higher-period oscillators as seen in a later section , can be used to hassle various patterns shown in gallery below. Later on the day of the oscillator's discovery, David Eppstein found a way to combine two of them to produce the first true period-22 glider gun .
On August 12, 2022 , this oscillator appeared semi-naturally for the first time, in a symmetric soup found by the Open Science Grid .^{[3]}
Glider synthesis
In February 2001 , Jason Summers found a 12-glider synthesis of this oscillator,^{[4]} which was improved to 11 gliders by 2718281828 in December 2017 ^{[5]} and later to 10 gliders by Mark Niemiec in September 2019 .^{[6]}
LCM oscillators
The LCM oscillators below are listed due to being the smallest known ones by population, while also satisfying the condition that at least one cell oscillates at the full period.
x = 33, y = 13, rule = B3/S23
27bo$25bo3b4o$25bo3bo$2o23bo$bo26bo$bobo13b3o6b2o$2b2o3bo8bo3bo$6bob2o
6bo4bo$5bo4bo6b2obo$6bo3bo8bo3b2o$7b3o13bobo$25bo$25b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 22 THUMBSIZE 2 ZOOM 12 LOOP 66 ]]
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p66 with caterer (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 35, y = 14, rule = B3/S23
23b2o$23bo$25b2o2$2o24bobo$bo$bobo13b3o8bobo$2b2o3bo8bo3bo$6bob2o6bo4b
o8bobo$5bo4bo6b2obo11bo$6bo3bo8bo3b2o9bo$7b3o13bobo7b2o$25bo$25b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 22 THUMBSIZE 2 ZOOM 12 LOOP 110 ]]
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p110 with pseudo-barberpole (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
Gallery
x = 49, y = 31, rule = B3/S23
22b2o7bo$23bo8bo2bo$23bobo4bo4bo4b2o$24b2o13bo2bo$29bo8b2ob2o$28b2ob2o
8bo$28bo2bo13b2o$29b2o4bo4bo4bobo$35bo2bo8bo$39bo7b2o4$23bo8b2o$16bo5b
2o7bobo$15bobo3bo10bo$15b2o5bobo$22bobo2$19b2o$2o16bo2bo$bo16b2obo$bob
o4b3o5bo2b2o$2b2o4bobo4bo$7bo3bo3bo3bo$7bo3bo3bo3bo$11bo4bobo4b2o$6b2o
2bo5b3o4bobo$5bob2o16bo$5bo2bo16b2o$6b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ZOOM 12 GPS 22 HEIGHT 460 WIDTH 500 ]]
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p22 lumps of muck hassler, found by praosylen (September 2015 )^{[7]} ; the boats can be replaced by blocks (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 49, y = 38, rule = B3/S23
22b2o$23bo$23bobo13b3o$24b2o3bo8bo3bo$28bob2o6bo4bo$27bo4bo6b2obo$28b
o3bo8bo3b2o$29b3o13bobo$47bo$47b2o5$25b2o$24bobo$23b2obo$12b2o10b2o7b
2o$13bo11bo7bobo$13bobo7bo11bo$14b2o7b2o10b2o$22bob2o$22bobo$22b2o5$2o
$bo$bobo13b3o$2b2o3bo8bo3bo$6bob2o6bo4bo$5bo4bo6b2obo$6bo3bo8bo3b2o$7b
3o13bobo$25bo$25b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ZOOM 12 GPS 22 HEIGHT 500 WIDTH 500 ]]
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p22 B-heptomino hassler, found by David Raucci (November 2021 )^{[8]} (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 72, y = 25, rule = B3/S23
17bo36bo$16bobo6b2o18b2o6bobo$13b2o3bo6bo20bo6bo3b2o$7b2o5b3o6bobo20b
obo6b3o5b2o$6bo2bo7bo5b2o22b2o5bo7bo2bo$7b2o9b2o32b2o9b2o$7b2o9b2o32b
2o9b2o$2b2o5bo7bo2bo30bo2bo7bo5b2o$bobo6b3o5b2o32b2o5b3o6bobo$bo6bo3b
2o17bob2o2b2obo17b2o3bo6bo$2o6bobo18bo3b2o2b2o3bo18bobo6b2o$9bo19bo12b
o19bo$30bo10bo$19bo32bo$2o16bobo30bobo16b2o$bo19bo28bo19bo$bobo13bo2b
o30bo2bo13bobo$2b2o4b3o5b2o36b2o5b3o4b2o$7bo2bo8bo32bo8bo2bo$7bo8bo2b
o32bo2bo8bo$9b2o5b3o4b2o22b2o4b3o5b2o$6bo2bo13bobo20bobo13bo2bo$5bo19b
o20bo19bo$6bobo16b2o18b2o16bobo$7bo56bo!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ZOOM 8 GPS 22 ]]
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p110 century shuttle, found by David Raucci (February 2022 )^{[9]} ; similar to diuresis (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 27, y = 16, rule = B3/S23
23b2o$22bo2bo$22bobo$23bob2o$24b3o$25b2o$2o$bo$bobo13b3o$2b2o3bo8bo3bo
$6bob2o6bo4bo$5bo4bo6b2obo$6bo3bo8bo3b2o$7b3o13bobo$25bo$25b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ZOOM 10 GPS 22 ]]
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p44 mold on Jason's p22, smallest known non-trivial p44 oscillator until 2016 discovery of mold on rattlesnake (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 88, y = 51, rule = B3/S23
61b2o7bo$62bo8bo2bo$62bobo4bo4bo4b2o$58b2o3b2o13bo2bo$58b2o8bo8b2ob2o
$67b2ob2o8bo$67bo2bo13b2o$53b2o3bobo7b2o4bo4bo4bobo$53b2o3bo2bo12bo2b
o8bo$58bobo17bo7b2o4$58bo$44b2o12b3o$44b2o2$48bo$39b2o6bobo2b3o$39b2o
20b2o$47b3o2bobo6b2o$53bo2$56b2o$41b3o12b2o$30b2o11bo$30b2o3$25b2o3bo
bo8bobo$25b2o3bo2bo6bo2bo3b2o$30bobo8bobo3b2o3$42b2o$30bo11b2o$30b3o3$
19b2o$2o16bo2bo2b3o$bo16b2obo11b2o$bobo4b3o5bo2b2o3bobo6b2o$2b2o4bobo
4bo9bo$7bo3bo3bo3bo$7bo3bo3bo3bo8b2o$11bo4bobo4b2o3b2o$6b2o2bo5b3o4bo
bo$5bob2o16bo$5bo2bo16b2o$6b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THUMBSIZE 2 ZOOM 8 GPS 22 HEIGHT 500 WIDTH 800 ]]
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Extensible p22 traffic light hassler, found by Matthias Merzenich (June 2021)^{[10]} (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
See also
30P25 , another rotationally symmetric oscillator consisting of an active region supported by two fishhooks
References
External links