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%I #4 Aug 12 2018 19:32:27
%S 1,8,118,3062,133136,10674882,1493271874,372575745070,164750515621344,
%T 129310307945204804,180180042920234266842,445515876091580535689544
%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A318016.
%e Some solutions for n=5
%e ..0..1..0..1..1. .0..1..0..0..0. .0..0..0..0..0. .0..0..0..0..1
%e ..1..0..0..0..1. .1..0..0..0..0. .0..1..1..1..0. .0..0..0..1..1
%e ..0..0..0..0..1. .0..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1
%e ..0..0..0..1..1. .0..0..0..0..1. .0..0..1..1..1. .0..1..1..1..0
%e ..0..0..1..1..0. .0..1..1..1..0. .0..0..0..0..1. .0..0..1..1..0
%Y Cf. A318016.
%K nonn
%O 1,2
%A _R. H. Hardin_, Aug 12 2018
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