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A175000 Number of stable n-celled patterns ("still lifes") in the HighLife (B36/S23) cellular automaton. 2
0, 0, 0, 2, 1, 4, 4, 9, 9, 25, 44, 111, 218 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Counts only distinct strict still lifes; reflections and rotations are removed. Pseudo-still lifes (e.g., patterns made up of two disjoint still lifes) are not counted.

LINKS

Table of n, a(n) for n=1..13.

LifeWiki, HighLife

EXAMPLE

a(4)=2 because there are only two still-lives with four cells: the block (a 2x2 block) and the tub (four cells bordering all four sides of an empty spot).

CROSSREFS

Cf. A019473, A166476

Sequence in context: A195691 A074763 A099932 * A008346 A119282 A241513

Adjacent sequences:  A174997 A174998 A174999 * A175001 A175002 A175003

KEYWORD

hard,more,nonn

AUTHOR

Christian Schroeder, Apr 03 2010

STATUS

approved

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Last modified August 10 12:39 EDT 2020. Contains 336379 sequences. (Running on oeis4.)