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,^[1] 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.^[2] 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.^[3]

↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
↑ 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.