%I #6 Apr 26 2020 20:45:46
%S 1,10,140,6686,898493,355281224,411280569141,1377458578461777,
%T 13439667379225204666,381706479329790703639253,
%U 31542814403404743062254741113,7585239934805237805543429969496485
%N Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 2 1's.
%C Diagonal of A295040.
%e Some solutions for n=4
%e ..0..1..1..0. .1..1..1..1. .1..0..0..0. .0..0..0..1. .1..0..1..1
%e ..0..0..1..1. .1..0..0..1. .1..0..0..0. .0..0..1..1. .1..0..1..0
%e ..1..0..0..1. .0..0..0..0. .1..0..0..0. .1..0..1..0. .0..0..0..1
%e ..1..1..0..1. .0..1..1..1. .0..0..0..0. .1..1..0..0. .0..1..1..1
%Y Cf. A295040.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 12 2017