20P2

	20P2
	<a href="/wiki/File:20p2.png" class="image" title="20P2 image"><img alt="20P2 image" src="/w/images/0/04/20p2.png" decoding="async" width="161" height="209" /></a>
	<a href="/wiki/File:20p2.png" class="image" title="20P2 image"><img alt="20P2 image" src="/w/images/0/04/20p2.png" decoding="async" width="161" height="209" /></a>
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Pattern type	Oscillator
Family	Beacon
Number of cells	21
Bounding box	8×11
Frequency class	31.2
Period	2
Mod	2
Heat	2
Volatility	0.09
Strict volatility	0.09
Rotor type	Diagonal on-off
Discovered by	Unknown
Year of discovery	Unknown
Rules
Outer-totalistic rules	B3/S23 – B3678/S01235678
Important rules	Conway Life
# of rules	29 = 512
Isotropic rules	B3a/S23acn – B2ik34-ijknw5-qr678/S01234-q5678
Glider synthesis
Fewest gliders	6
Catagolue-generated RLE	20p2_synth.rle
Pattern files
Plaintext	20p2.cells
RLE	20p2.rle
Identifiers
apgcode	xp2_wgj1u0og26z25421
Pentadecathlon ID	21P2.1593

20P2 is a period-2 oscillator composed of a beacon stabilizing an unnamed induction coil (a weld of a dock and a mango).

Commonness

20P2 is about the thirty-fourth most common naturally-occurring oscillator in Achim Flammenkamp's census, being slightly less common than the cis-beacon on cap and the 1 beacon but more common than the cis-beacon down on long hook.^[1] It is currently the most common unnamed oscillator.

↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.