Eater/block frob

	Eater/block frob
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 10, y = 10, rule = B3/S23 b2o$2bo$2bobo$3bobo$5b2ob2o$8b2o$2b2o$3bo$3o$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ LOOP 4 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>x = 10, y = 10, rule = B3/S23 b2o$2bo$2bobo$3bobo$5b2ob2o$8b2o$2b2o$3bo$3o$o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ LOOP 4 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
Number of cells	20
Bounding box	10×10
Period	4
Mod	4
Heat	8.5
Volatility	0.55
Strict volatility	0.55
Discovered by	David Buckingham
Year of discovery	Unknown
Rules
Outer-totalistic rules	B3/S23 – B3678/S023678
Important rules	Conway Life, HighLife
# of rules	27 = 128
Isotropic rules	B3-ceky/S2-n3-ejky – B2i34-ajnr5-acq678/S0234-ajnrw5-ijq678
Glider synthesis
Fewest gliders	12
Catagolue-generated RLE	eaterblockfrob_synth.rle
Uploaded synthesis RLE	eaterblockfrob_synth.rle
Pattern files
Plaintext	eaterblockfrob.cells
RLE	eaterblockfrob.rle
Identifiers
apgcode	xp4_64k8wc871zx1ro
Pentadecathlon ID	20P4.4

Eater/block frob is a period-4 oscillator found by David Buckingham in 1976 or earlier.[1] It is composed of an eater 1, a block, and what is roughly a hook with tail. It is most useful in its use in the p4 bumper. It is an eater 5 constantly being renewed by an eater 1. The block can be replaced with a long hook with tail, and the eater 1 can be replaced with a LW emulator, MW emulator or HW emulator.

References

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

External links

Eater/block frob at the Life Lexicon

Eater/block frob at Adam P. Goucher's Catagolue

20P4.4 at Heinrich Koenig's Game of Life Object Catalogs

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[1] Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.