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%I #4 May 08 2018 10:52:01
%S 5,17,17,32,62,108,190,348,636,1152,2082,3768,6840,12412,22486,40744,
%T 73872,133932,242782,440076,797732,1446128,2621506,4752084,8614284,
%U 15615592,28307242,51313936,93019232,168620580,305667118,554098192
%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.
%C Column 4 of A304221.
%H R. H. Hardin, <a href="/A304217/b304217.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +2*a(n-3) +a(n-4) +a(n-5) -2*a(n-7) for n>9
%e Some solutions for n=7
%e ..0..0..0..1. .0..1..1..1. .0..1..1..0. .0..0..0..0. .0..0..0..1
%e ..0..0..1..1. .1..1..1..1. .1..1..1..1. .0..0..0..0. .0..0..0..0
%e ..0..1..1..1. .1..1..1..1. .1..1..1..1. .0..0..0..0. .0..0..0..0
%e ..1..1..1..1. .1..1..0..1. .1..1..1..0. .0..1..0..0. .0..0..0..0
%e ..1..1..1..1. .1..1..1..1. .1..1..0..0. .0..0..0..0. .0..0..0..0
%e ..1..1..1..1. .1..1..1..1. .1..0..0..0. .0..0..0..0. .0..0..0..1
%e ..0..1..1..0. .0..1..1..1. .0..0..0..0. .0..0..0..0. .0..0..1..1
%Y Cf. A304221.
%K nonn
%O 1,1
%A _R. H. Hardin_, May 08 2018
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