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%I #4 Oct 12 2018 12:34:15
%S 1,6,47,786,27236,1957026,282206549,84346447443,51065576746070,
%T 63169593120391316
%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A320409.
%e Some solutions for n=5
%e ..0..1..0..0..1. .0..1..1..1..1. .0..0..0..0..1. .0..0..0..0..0
%e ..0..0..0..0..1. .1..1..0..0..1. .1..1..1..0..1. .0..1..1..1..0
%e ..1..0..0..0..1. .1..0..1..1..1. .1..1..0..1..1. .1..0..0..0..0
%e ..0..1..1..1..1. .1..0..1..1..1. .0..1..1..1..1. .1..0..0..0..0
%e ..0..1..1..0..1. .1..1..1..0..1. .1..1..1..1..1. .1..0..1..0..1
%Y Cf. A320409.
%K nonn
%O 1,2
%A _R. H. Hardin_, Oct 12 2018