login
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 3 1's.
0

%I #6 Apr 26 2020 20:49:50

%S 2,8,76,1877,123783,22091007,11500075769,17390584281932,

%T 75403580062034596,925132781374075718095,31778302417345693041196311

%N Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 2 or 3 1's.

%C Diagonal of A295352.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A295352.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 20 2017