Jam

	Jam
	<a href="/wiki/File:Jam.png" class="image" title="Jam image"><img alt="Jam image" src="/w/images/f/fa/Jam.png" decoding="async" width="129" height="145" /></a>
	<a href="/wiki/File:Jam.png" class="image" title="Jam image"><img alt="Jam image" src="/w/images/f/fa/Jam.png" decoding="async" width="129" height="145" /></a>
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Pattern type	Oscillator
Number of cells	13
Bounding box	7×7
Frequency class	27.6
Period	3
Mod	3
Heat	7.3
Volatility	0.55
Strict volatility	0.55
Discovered by	Achim Flammenkamp
Year of discovery	1988
Rules
Outer-totalistic rules	B3/S23 – B378/S0235678
Important rules	Conway Life
# of rules	27 = 128
Isotropic rules	B3aijnq/S23acqr – B2ci34-ajnz5-ck6-a78/S0234ceqtwyz5678
Glider synthesis
Fewest gliders	6
Catagolue-generated RLE	jam_synth.rle
Uploaded synthesis RLE	jam_synth.rle
Pattern files
Plaintext	jam.cells
RLE	jam.rle
Identifiers
apgcode	xp3_695qc8zx33
Pentadecathlon ID	13P3.1

Jam was found by Achim Flammenkamp in 1988, but not widely known about until its independent discovery (and naming) by Dean Hickerson in September 1989. In terms of its 7×7 bounding box it ties with trice tongs as the smallest period-3 oscillator, though caterer has fewer cells.

Commonness

Jam is about the seventeenth most common naturally-occurring oscillator in Achim Flammenkamp's census, being slightly less common than the blocker.^[1] On Catagolue, it is the second most common period 3 oscillator, being less common than the pulsar but more common than the candlefrobra on trans-block.^[2]

↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
↑ Adam P. Goucher. "Census". Catagolue. Retrieved on October 27, 2018.