%I #4 Aug 13 2018 14:24:38
%S 21,91,368,1222,6525,32385,204645,1284756,8133386,51773454,331053698,
%T 2126470209,13650378979,87727825675,563717129308,3623363068053,
%U 23291574091030,149752468455094,962944454411938,6192412939272588
%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Column 7 of A318037.
%H R. H. Hardin, <a href="/A318036/b318036.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..1..0..1..1. .0..0..1..0..1..0..1. .0..0..1..0..1..1..0
%e ..0..0..0..0..1..1..0. .0..0..1..1..0..1..1. .0..0..1..1..1..1..1
%e ..1..0..0..1..0..0..1. .1..0..0..0..0..0..1. .1..0..1..1..1..1..1
%e ..0..0..0..1..0..1..0. .0..1..0..0..0..1..1. .0..0..0..1..0..1..1
%e ..0..1..0..1..0..1..0. .1..1..1..0..0..0..1. .0..0..0..0..0..0..1
%Y Cf. A318037.
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 13 2018
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