Caterer on Beluchenko's p13

Caterer on Beluchenko's p13 is a period-39 oscillator discovered by Jason Summers in January 2009[1] that is composed of a caterer and a nearby Beluchenko's p13. With a minimum population of 46 cells, it is the smallest known period 39 oscillator, although jam on 34P13 (pictured below) has a smaller bounding box.

Caterer on Beluchenko's p13
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html> #C Smallest known period-39 oscillator, found 6 January 2009 x = 23, y = 16, rule = B3/S23 5b2o4b3o$4bo$7bo5bo$3bo3bo5b2o$4o3bo4bo$5bo9bo$11bo3bo$16b2o$7b2o2b3o 5bo$7b2o5bo4b2obo$14bo3bo3bo$14bobo5bo3$13b2o$13b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>[[ THUMBSIZE 2 GPS 7 ZOOM 16 ]]</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 46
Bounding box 24×17
Period 39
Mod 39
Heat 44.9
Volatility 0.95
Strict volatility 0.01
Discovered by Jason Summers
Year of discovery 2009

Although it is made up of a period-3 oscillator and a period-13 oscillator, it is considered non-trivial because it has a single cell that is alive in generation 11 but dead in the other 38 phases.

Generation 11 reveals the single cell that oscillates at the full period (in green)
Jam on Beluchenko's p13 with a smaller bounding box of 22×17. View animate image.
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See also

References
  1. "New Oscillators at Game of Life News" (January 8, 2009). Retrieved on June 17, 2009.
  • 46P39.1 at Heinrich Koenig's Game of Life Object Catalogs
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