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%I #4 Jun 08 2018 08:15:34
%S 1,25,152,1151,8415,61796,453553,3329201,24436772,179369495,
%T 1316598259,9664023496,70935343213,520675774985,3821836201340,
%U 28052835663739,205911909175803,1511423474214692,11094068951867649,81432085718227557
%N Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
%C Column 3 of A305692.
%H R. H. Hardin, <a href="/A305687/b305687.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 6*a(n-1) +8*a(n-2) +12*a(n-3) +11*a(n-4) -a(n-5) +a(n-6) +a(n-7) -a(n-8)
%e Some solutions for n=5
%e ..0..1..1. .0..1..1. .0..0..0. .0..1..1. .0..0..1. .0..0..1. .0..1..1
%e ..0..0..1. .0..1..0. .1..1..1. .0..1..0. .0..1..0. .1..1..1. .1..0..0
%e ..1..0..0. .1..1..0. .1..1..1. .0..1..1. .1..1..0. .0..0..0. .0..1..1
%e ..0..1..1. .0..0..0. .0..0..1. .0..1..0. .1..0..1. .1..0..0. .0..0..0
%e ..0..0..1. .1..1..0. .0..1..0. .0..0..0. .1..0..1. .0..1..0. .0..1..0
%Y Cf. A305692.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jun 08 2018
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