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A166476
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Number of stable n-celled patterns ("still lifes") in the 2x2 (B36/S125) cellular automaton.
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3
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OFFSET
| 1,2
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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.
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LINKS
| LifeWiki, 2x2
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EXAMPLE
| a(3) = 1 because there is only one distinct still life with three cells: a diagonal line of length three.
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CROSSREFS
| Cf. A019473
Sequence in context: A134876 A019612 A007444 * A052950 A086851 A001054
Adjacent sequences: A166473 A166474 A166475 * A166477 A166478 A166479
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KEYWORD
| hard,more,nonn
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AUTHOR
| Nathaniel Johnston (nathaniel(AT)nathanieljohnston.com), Oct 14 2009
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