31.4

31.4
x = 13, y = 8, rule = B3/S23 2b2o$2bobo$4bo4b2o$4ob2o2bo2bo$o2bobobobob2o$3bobobobo$4b2obobo$8bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] #C [[ AUTOSTART THUMBSIZE 2 LOOP 2 ZOOM 24 GPS 60 ]]
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Pattern type	Strict still life
Number of cells	31
Bounding box	13 × 8
Discovered by	Mike Playle
Year of discovery	2013
Rules Outer-totalistic rules B/S23 – B378/S012345678 # of rules 210 = 1024 Isotropic rules B/S2-n3knry – B2in34cejkryz5cein6-ik78/S012345678
Glider synthesis Fewest gliders 14 Catagolue-generated RLE synthesis
Pattern files Plaintext 31.4.cells RLE 31.4.rle
Identifiers apgcode xs31_0g89fgkcz8llljgzx641

31.4 is the catalyst used in the Snark reflector, nicknamed the "heart" of the Snark. It is also used in the CP semi-Snark.

The "4" of the 31.4 comes from the fact that it is the fourth 31-bit object in Mark Niemiec's still life collection.

See also

• Snark

External links

• 31.4 at Adam P. Goucher's Catagolue