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%I #4 Apr 30 2018 17:21:56
%S 21,127,83,202,291,597,1217,2767,6147,14940,34846,84947,210191,538910,
%T 1368999,3502960,8990885,23400795,61220178,160733766,422311782,
%U 1114702509,2954914697,7862464520,20960436098,55991586940,149902307803
%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.
%C Column 7 of A303808.
%H R. H. Hardin, <a href="/A303807/b303807.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..1..0..1..1..1..1. .0..1..1..1..0..1..0. .0..0..0..0..0..0..1
%e ..0..0..1..1..1..1..0. .1..1..1..1..1..0..0. .0..0..0..0..0..0..0
%e ..0..0..1..1..1..0..0. .1..1..1..1..1..0..0. .0..0..0..0..0..0..0
%e ..0..0..1..1..0..0..0. .1..1..1..1..1..0..0. .1..0..0..0..0..0..0
%e ..1..0..1..0..0..0..0. .0..1..1..1..0..1..0. .1..1..0..0..0..0..1
%Y Cf. A303808.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 30 2018
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