By flops

	By flops
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	<a href="/wiki/File:Byflops.png" class="image" title="By flops image"><img alt="By flops image" src="/w/images/3/34/Byflops.png" decoding="async" width="129" height="145" /></a>
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Pattern type	Oscillator
Family	Griddle
Number of cells	13
Bounding box	6×7
Frequency class	38.6
Period	2
Mod	1
Heat	18
Volatility	0.82
Strict volatility	0.82
Discovered by	Robert Wainwright
Year of discovery	Unknown
Rules
Outer-totalistic rules	B3/S23 – B3678/S2345678
Important rules	Conway Life, HighLife
# of rules	28 = 256
Isotropic rules	B3enqr/S2i3y – B2-ac34-kt5-e678/S2345678
Glider synthesis
Fewest gliders	9
Catagolue-generated RLE	byflops_synth.rle
Uploaded synthesis RLE	byflops_synth.rle
Pattern files
Plaintext	byflops.cells
RLE	byflops.rle
Identifiers
apgcode	xp2_4k1u1k4zx1
Pentadecathlon ID	13P2.3

By flops (or butterfly^[1]) is a period-2 oscillator found by Robert Wainwright^[2] that is extremely similar to why not: in fact in one phase it is only one cell different. It first appeared naturally in Catagolue on May 21, 2015, in a soup submitted by Brett Berger^[3], and it was also in Andrzej Okrasinski's census.

References

↑ "Oscillating Object Info - Butterfly". Retrieved on March 16, 2009.
↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
↑ Brett Berger (May 21, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums