258P3

258P3 is a period-3 oscillator discovered by Noam Elkies on June 25, 1997.[1] In generation 2 it provides an isolated domino spark which can lead to higher period oscillators, such as the first known period-33 oscillator, 258P3 on Achim's p11. A related but slightly smaller oscillator was found by Karel Suhajda on January 13, 2003.[2]

258P3
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 28, y = 25, rule = B3/S23 3bo3bobob6obobo3bo$2bob2obo2bobo2bobo2bob2obo$2bo7b2o4b2o7bo$b2o2bo3bo 2b4o2bo3bo2b2o$o2b6ob2o4b2ob6o2bo$2o6b2ob6ob2o6b2o$2b2obo16bob2o$2o2bo 8b2o8bo2b2o$bobo2b3o3bo2bo3b3o2bobo$o2b3o5b2o2b2o5b3o2bo$b2o3bob2obo4b ob2obo3b2o$2bobo2bob3o4b3obo2bobo$2bob2obo3b6o3bob2obo$b2o2bobobobo4bo bobobo2b2o$o2bo7b6o7bo2bo$b2o3bo14bo3b2o$5bo3b4o2b4o3bo$4bob2obo2bo2bo 2bob2obo$4bo2b3o8b3o2bo$b2obo2b3o2bo2bo2b3o2bob2o$b2obob2o4b4o4b2obob 2o$5bo3bo8bo3bo$6bobo10bobo$4bobobobo6bobobobo$4b2o3b2o6b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ THUMBSIZE 3 GPS 2 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type Oscillator
Number of cells 258
Bounding box 28×27
Period 3
Mod 3
Heat 130.7
Volatility 0.54
Strict volatility 0.54
Discovered by Noam Elkies
Year of discovery 1997
Generation 2 reveals the isolated domino spark.
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 28, y = 24, rule = B3/S23 13b2o2$3b2o3bob2o4b2obo3b2o$2bo3bobo3b4o3bobo3bo$2bobo5bo2b2o2bo5bobo$ b2o6b2o2b2o2b2o6b2o$o2b3o4b2o4b2o4b3o2bo$2o4b3o3b4o3b3o4b2o$2b3ob3o10b 3ob3o$2o5bo4b4o4bo5b2o$bobo3b2o10b2o3bobo$o2b3o3bo2bo2bo2bo3b3o2bo$b2o 3b2o3b6o3b2o3b2o$2bobo4b2o2b2o2b2o4bobo$2bob2obobo3b2o3bobob2obo$b2o2b ob5o4b5obo2b2o$o2bob2o4b6o4b2obo2bo$bobobobobo8bobobobobo$2obo6b8o6bob 2o$3b2o2b2o10b2o2b2o$2obo2bo2b3ob2ob3o2bo2bob2o$o3b2o2bo2bob2obo2bo2b 2o3bo$b3o5b2o6b2o5b3o$3bo20bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 10 THUMBSIZE 2 GPS 2 AUTOSTART LOOP 3 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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A related domino sparker
discovered by Karel Suhajda
Catagolue: here
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RLE: here Plaintext: here
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 28, y = 24, rule = B3/S23 13b2o2$3b2o3bob2o4b2obo3b2o$2bo3bobo3b4o3bobo3bo$2bobo5bo2b2o2bo5bobo$ b2o6b2o2b2o2b2o6b2o$o2b3o4b2o4b2o4b3o2bo$2o4b3o3b4o3b3o4b2o$2b3ob3o10b 3ob3o$2o5bo4b4o4bo5b2o$bobo3b2o10b2o3bobo$o2b3o3bo2bo2bo2bo3b3o2bo$b2o 3b2o3b6o3b2o3b2o$2bobo4b2o2b2o2b2o4bobo$2bob2obobo3b2o3bobob2obo$b2o2b ob5o4b5obo2b2o$o2bob2o4b6o4b2obo2bo$bobobobobo8bobobobobo$2obo6b3o2b3o 6bob2o$3b2o2b2o3bo2bo3b2o2b2o$2obo2bo2b3o4b3o2bo2bob2o$o3b2o2bo10bo2b 2o3bo$b3o5b3o4b3o5b3o$3bo7bo4bo7bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 10 THUMBSIZE 2 GPS 2 AUTOSTART LOOP 3 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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A reduction by Entity Valkyrie
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RLE: here Plaintext: here
gollark: Oh no. Has Macron begun?!
gollark: Oh dear.
gollark: I don't know what you mean; is it Macron, LyricLy?
gollark: Oh hypermemetic ultrabees of cryoapiocity class 112-γ.
gollark: <@319753218592866315> make Macron.

References
  1. Jason Summers' all-osc pattern collection.
  2. Jason Summers' all-osc pattern collection.
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