A166476 Number of stable n-celled patterns ("still lifes") in the 2x2 (B36/S125) cellular automaton.

0, 2, 1, 3, 4, 9, 10, 27, 48, 126

Offset: 1

Author

Nathaniel Johnston, Oct 14 2009

Keywords

• hard
• more
• nonn

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.

Examples

			a(3) = 1 because there is only one distinct still life with three cells: a diagonal line of length three.
		

Links

• LifeWiki, 2x2

Crossrefs

Cf. A019473