Caterer on 28P7.3

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Caterer on 28P7.3
x = 17, y = 13, rule = B3/S23 obo$2obo$3bo2b2o$2obobobo2b2o$o2bo2bo5bo$2bo6bo$4bo4bo3bo$2b3o4bo3b4o$ 11bo$6b2o$6bobo$8bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 96 THUMBSIZE 3 GPS 4 ZOOM 16 HEIGHT 640 WIDTH 640 ]]
Pattern type Oscillator
Number of cells 40
Bounding box 13×17
Period 21
Mod 21
Heat 22.7
Volatility 0.67
Strict volatility 0.01
Discovered by Unknown
Year of discovery Unknown

Caterer on 28P7.3 is a period-21 oscillator that is composed of a caterer and 28P7.3. Although it is composed of two oscillators of smaller periods (3 and 7 respectively), it is considered non-trivial because it contains a single cell that is alive in generation 5 and dead in the other 20 phases of the oscillator. In terms of its 40 cells, it is the smallest known non-trivial period 21 oscillator, although the trivial burloaferimeter and long hook eating tub has a minimum population of only 36 cells.

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