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%I #4 Aug 07 2018 21:55:24
%S 1,2,2,7,38,142,1575,13712,112854,1446948,21089268,358570823,
%T 7306257506
%N Number of nXn 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A317815.
%e Some solutions for n=5
%e ..0..1..0..0..0. .0..1..0..0..1. .0..1..0..1..0. .0..1..0..0..0
%e ..1..1..1..1..1. .1..1..1..1..0. .1..0..0..1..1. .1..1..1..1..1
%e ..0..1..1..0..0. .0..1..1..0..0. .1..0..1..1..0. .0..1..1..0..0
%e ..0..1..0..0..1. .0..1..0..0..0. .0..1..1..0..0. .0..1..0..0..1
%e ..1..0..1..1..0. .1..0..0..0..0. .0..1..0..0..0. .0..1..0..1..0
%Y Cf. A317815.
%K nonn
%O 1,2
%A _R. H. Hardin_, Aug 07 2018
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