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.
Table of n, a(n) for n=1..10.
a(3) = 1 because there is only one distinct still life with three cells: a diagonal line of length three.
Sequence in context: A019612 A007444 A332309 * A052950 A086851 A001054
Adjacent sequences: A166473 A166474 A166475 * A166477 A166478 A166479
Nathaniel Johnston, Oct 14 2009