%I #7 Apr 20 2020 00:00:05
%S 1,8,252,31012,14905344,27990353344,205353183605152,
%T 5886041167193603328,659134453175183361984192,
%U 288372301975051917749449831520,492903495313227230995120900845724672
%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A301407.
%H R. H. Hardin, <a href="/A301401/b301401.txt">Table of n, a(n) for n = 1..15</a>
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
%e ..0..0..0..1..1. .0..0..0..0..1. .0..0..0..1..1. .0..0..0..0..1
%e ..1..1..0..0..0. .0..1..1..0..1. .0..1..1..1..1. .1..1..0..1..1
%e ..1..0..0..0..1. .0..0..1..1..1. .0..1..1..0..1. .0..1..0..0..1
%e ..0..1..0..0..0. .1..0..1..0..1. .1..1..1..0..0. .0..1..0..1..1
%Y Cf. A301407.
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 20 2018
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