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%I #4 Apr 28 2018 09:33:18
%S 0,209,108,1744,2809,19068,55382,273621,934066,4202604,15472710,
%T 66178236,253206464,1054639996,4118641264,16900720621,66776102270,
%U 271648054383,1080722426035,4373896909559,17472759594897,70501053021557
%N Number of nX6 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.
%C Column 6 of A303690.
%H R. H. Hardin, <a href="/A303688/b303688.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..1..0..1..1..0. .0..0..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..1..0
%e ..0..1..1..0..0..1. .1..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1
%e ..0..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1. .1..1..1..0..0..1
%e ..1..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1. .0..1..1..0..0..1
%e ..0..0..0..1..0..1. .1..0..0..1..1..0. .1..0..0..1..1..0. .0..1..1..0..1..0
%Y Cf. A303690.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 28 2018
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