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Number of n X n 0..1 arrays with each 1 adjacent to 0 or 3 king-move neighboring 1's.
0

%I #6 Apr 26 2020 20:54:55

%S 2,6,39,467,10290,431844,33703065,4933593439,1353357158724,

%T 695062929397500,668849535352606829,1205528922118577365911

%N Number of n X n 0..1 arrays with each 1 adjacent to 0 or 3 king-move neighboring 1's.

%C Diagonal of A295918.

%e Some solutions for n=5

%e ..0..0..0..0..0. .1..0..0..0..0. .1..0..1..0..1. .0..0..0..0..0

%e ..0..1..0..0..0. .0..0..1..0..1. .0..0..0..0..0. .0..0..1..0..0

%e ..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .1..0..0..0..1

%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..1. .0..0..0..0..0

%e ..1..0..0..0..1. .0..0..1..0..0. .0..1..0..1..1. .0..0..0..0..0

%Y Cf. A295918.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 29 2017