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%I #4 Apr 28 2018 09:22:44
%S 21,103,57,90,150,245,367,509,697,957,1311,1851,2671,3869,5547,7907,
%T 11275,16101,22959,32717,46663,66633,95139,135763,193701,276435,
%U 394533,563013,803377,1146445,1636117,2334893,3331971,4754851,6785501,9683407
%N Number of nX7 0..1 arrays with every element unequal to 0, 1 or 3 king-move adjacent elements, with upper left element zero.
%C Column 7 of A303682.
%H R. H. Hardin, <a href="/A303681/b303681.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +a(n-4) +a(n-8) for n>14
%e Some solutions for n=5
%e ..0..0..0..0..0..1..1. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..1. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0
%e ..0..0..0..0..0..0..0. .1..0..0..0..0..0..0. .0..0..0..0..0..0..1
%e ..1..0..0..0..0..0..0. .1..1..0..0..0..0..0. .0..0..0..0..0..1..1
%e ..1..1..0..0..0..0..0. .1..1..1..0..0..0..1. .1..0..0..0..1..1..1
%Y Cf. A303682.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 28 2018
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