%I #4 May 27 2018 17:42:53
%S 8,49,54,116,253,541,1248,2831,6471,14788,33887,77571,177642,406875,
%T 931841,2134242,4888087,11195485,25641380,58727691,134506571,
%U 308066476,705578355,1616017727,3701237834,8477110559,19415506245,44468203154
%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3 or 8 king-move adjacent elements, with upper left element zero.
%C Column 4 of A305230.
%H R. H. Hardin, <a href="/A305226/b305226.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +3*a(n-2) +a(n-3) -a(n-4) -3*a(n-5) -2*a(n-6) +2*a(n-7) for n>9
%e Some solutions for n=5
%e ..0..1..0..0. .0..0..0..0. .0..0..1..0. .0..0..0..0. .0..0..0..0
%e ..1..1..1..0. .1..1..1..1. .0..1..1..1. .0..0..0..0. .0..0..0..0
%e ..1..1..1..1. .1..1..1..1. .1..1..1..0. .0..0..0..0. .0..0..0..0
%e ..1..1..0..1. .1..1..0..1. .1..1..0..0. .0..0..0..0. .0..0..0..0
%e ..0..1..1..1. .0..1..1..1. .1..0..0..0. .1..0..0..1. .1..1..1..1
%Y Cf. A305230.
%K nonn
%O 1,1
%A _R. H. Hardin_, May 27 2018
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