%I #6 Apr 26 2020 20:47:09
%S 1,5,33,578,21185,1767431,329926211,137994394960,129350877831211,
%T 271756998888328388,1279500367201581413204,13501456561909863649426230
%N Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1's.
%C Diagonal of A295097.
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..1..1..0..0. .0..0..0..0..0. .0..1..0..0..0
%e ..0..0..0..0..1. .1..0..0..0..0. .0..0..0..1..1. .0..1..1..0..0
%e ..0..1..1..0..1. .1..0..0..1..0. .0..0..0..0..0. .1..1..0..0..1
%e ..0..0..0..0..0. .0..0..1..1..0. .0..0..0..0..0. .0..1..0..0..1
%e ..0..0..0..1..1. .1..1..0..1..0. .1..1..0..0..0. .0..0..0..0..0
%Y Cf. A295097.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 14 2017