A295246 - OEIS

%I #6 Apr 26 2020 20:49:19

%S 2,11,183,8271,1081924,403318354,430246838462,1312008367581053,

%T 11440395910000265070,285225326541505567932583,

%U 20332459513033508982984463884

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

%C Diagonal of A295253.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A295253.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 18 2017