By flops

	By flops
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html> 3bo2b$bobo2b$5bo$5ob$5bo$bobo2b$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html> 3bo2b$bobo2b$5bo$5ob$5bo$bobo2b$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ LOOP 2 GPS 2 THUMBSIZE 2 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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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 on May 21, 2015, in a soup submitted to Catagolue by Brett Berger.[3]

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

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