%I #4 May 08 2018 11:03:35
%S 4,3,5,6,11,16,22,33,49,71,104,153,224,328,481,705,1033,1514,2219,
%T 3252,4766,6985,10237,15003,21988,32225,47228,69216,101441,148669,
%U 217885,319326,467995,685880,1005206,1473201,2159081,3164287,4637488,6796569
%N Number of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero.
%C Column 3 of A304230.
%H R. H. Hardin, <a href="/A304225/b304225.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = a(n-1) +a(n-3) for n>5
%e Some solutions for n=5
%e ..0..1..1. .0..0..0. .0..0..0. .0..1..1. .0..0..1. .0..1..1. .0..0..0
%e ..1..0..1. .0..0..0. .0..0..0. .1..0..1. .0..1..0. .1..0..1. .0..0..0
%e ..1..1..1. .0..0..0. .0..1..0. .1..1..1. .0..0..0. .1..1..1. .0..0..0
%e ..1..0..1. .0..0..0. .0..1..0. .1..1..1. .0..1..0. .1..0..1. .0..1..0
%e ..0..1..1. .0..0..0. .0..0..0. .1..1..1. .1..0..0. .1..1..0. .1..0..0
%Y Cf. A304230.
%K nonn
%O 1,1
%A _R. H. Hardin_, May 08 2018
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