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%I #6 Sep 16 2020 19:04:14
%S 0,3,49,1401,106803,19457754,7600681910,7516309079483,
%T 16637614325062889
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A303254.
%e Some solutions for n=5
%e ..0..0..1..1..0. .0..0..0..0..1. .0..1..1..1..0. .0..0..0..0..1
%e ..0..0..1..0..1. .1..1..0..1..1. .1..0..0..0..1. .1..1..1..1..1
%e ..1..0..0..1..1. .1..0..0..1..1. .1..0..1..1..0. .1..0..0..0..0
%e ..1..1..0..1..0. .1..0..0..0..0. .0..1..0..1..1. .0..1..1..1..0
%e ..0..0..1..0..0. .1..1..1..1..1. .1..0..0..1..1. .0..0..0..0..1
%Y Cf. A303254.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 20 2018
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