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%I #4 Apr 11 2018 12:24:58
%S 3,3,8,7,11,18,29,47,76,123,199,322,521,843,1364,2207,3571,5778,9349,
%T 15127,24476,39603,64079,103682,167761,271443,439204,710647,1149851,
%U 1860498,3010349,4870847,7881196,12752043,20633239,33385282,54018521
%N Number of nX3 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Column 3 of A302680.
%H R. H. Hardin, <a href="/A302675/b302675.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +a(n-2) for n>5
%e Some solutions for n=5
%e ..0..1..0. .0..0..0. .0..1..0. .0..1..0. .0..0..0. .0..0..0. .0..1..0
%e ..0..0..0. .0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..1..0. .0..0..0
%e ..0..1..0. .0..1..0. .0..0..0. .0..0..0. .0..1..0. .0..1..0. .1..1..1
%e ..0..1..0. .0..1..0. .0..1..0. .1..1..1. .0..1..0. .0..0..0. .1..0..1
%e ..0..1..0. .0..1..0. .0..1..0. .1..0..1. .0..0..0. .0..1..0. .1..0..1
%Y Cf. A302680.
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 11 2018
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