%I #4 May 08 2018 11:04:26
%S 8,5,6,11,20,46,97,189,395,836,1701,3492,7284,15033,30913,63989,
%T 132350,272947,563756,1165374,2406457,4969281,10266751,21207248,
%U 43798629,90470888,186881300,385997321,797284757,1646862265,3401654354,7026194587
%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.
%C Column 4 of A304230.
%H R. H. Hardin, <a href="/A304226/b304226.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +5*a(n-3) -4*a(n-6) for n>8
%e Some solutions for n=5
%e ..0..1..1..1. .0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
%e ..1..0..1..1. .0..0..0..0. .0..0..0..0. .0..0..1..0. .0..0..0..0
%e ..1..1..1..1. .0..0..1..0. .0..0..1..0. .0..0..1..0. .0..1..1..0
%e ..1..1..0..1. .0..1..0..0. .0..0..1..0. .0..0..0..0. .0..0..0..0
%e ..1..1..1..0. .0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
%Y Cf. A304230.
%K nonn
%O 1,1
%A _R. H. Hardin_, May 08 2018
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