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%I #6 Apr 26 2020 20:50:51
%S 1,10,147,7071,1012315,437241277,563330031268,2154370064869978,
%T 24591601562099287015,837044464889796587986014,
%U 84914857903369744218835564258
%N Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 4 1's.
%C Diagonal of A295531.
%e Some solutions for n=5
%e ..1..0..1..0..0. .0..0..1..0..0. .0..0..1..0..0. .0..0..0..0..0
%e ..1..1..1..1..0. .0..0..1..0..0. .0..0..1..0..1. .0..0..0..0..0
%e ..0..0..1..0..1. .1..0..1..0..1. .1..0..0..1..1. .0..1..1..0..1
%e ..1..0..0..0..1. .1..0..0..1..1. .1..0..1..0..0. .1..1..0..1..1
%e ..1..0..1..1..1. .0..0..0..1..0. .0..0..1..0..0. .0..0..0..1..0
%Y Cf. A295531.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 23 2017
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