Number of configurations in Conway's game of "Life" that fit into an n X n square and vanish in one step.
2, 11, 51, 860, 28156, 1093273, 110321561, 21929490122, 6858741615699
1 seqfan posts
Thu Apr 15 12:44:58 CEST 2010 [seqfan] A few seqs related to the Game of Life on toroidal NxN board.