Tripole

	Tripole
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Pattern type	Oscillator
Oscillator type	Muttering moat
Family	Barberpole
Number of cells	9
Bounding box	6×6
Frequency class	26.6
Period	2
Mod	1
Heat	6
Volatility	0.50
Strict volatility	0.50
Rotor type	Pole 3
Discovered by	MIT group
Year of discovery	1970
Rules
Outer-totalistic rules	B3/S23 – B35678/S2345678
Important rules	Conway Life, HighLife
# of rules	29 = 512
Isotropic rules	B3c/S2ae3n – B2ckn34-r5678/S1e2345678
Glider synthesis
Fewest gliders	5
Catagolue-generated RLE	tripole_synth.rle
Uploaded synthesis RLE	tripole_synth.rle
Pattern files
Plaintext	tripole.cells
RLE	tripole.rle
Identifiers
apgcode	xp2_g0k053z11
Pentadecathlon ID	9P2.1

The tripole is the barberpole of length 3.

Commonness

The tripole is about the fourteenth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than quadpole on ship but more common than mazing.^[1]

Martin Grant improved the previous 7-glider synthesis to 6 gliders on June 23, 2017.^[2] A 5-glider synthesis was found in September 2020.^[3]

↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
↑ Extremeenthusiast (June 23, 2017). "Re: Synthesising Oscillators". ConwayLife.com forums. Retrieved on June 24, 2017.
↑ Ian07 (September 21, 2020). Re: Randomly enumerating glider syntheses (discussion thread) at the ConwayLife.com forums