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%I #4 Mar 26 2018 16:27:50
%S 64,8192,772272,75632400,7381982784,720677122368,70356843337600,
%T 6868652110439488,670558705424435264,65463930429261156928,
%U 6390978398666846999104,623925337422198984802880
%N Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
%C Column 7 of A301784.
%H R. H. Hardin, <a href="/A301783/b301783.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A301783/a301783.txt">Empirical recurrence of order 46</a>
%F Empirical recurrence of order 46 (see link above)
%e Some solutions for n=5
%e ..0..0..0..0..0..0..0. .0..0..0..0..0..1..0. .0..0..0..0..0..0..1
%e ..0..0..1..0..1..1..1. .0..0..1..0..1..0..1. .0..0..1..0..0..1..0
%e ..0..0..1..0..1..0..1. .0..0..1..0..0..1..0. .0..0..1..0..1..1..0
%e ..0..0..1..1..1..0..1. .0..0..1..0..1..0..0. .0..0..1..0..1..0..0
%e ..0..0..0..1..0..0..1. .0..0..0..1..0..0..1. .0..0..0..1..0..0..1
%Y Cf. A301784.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 26 2018
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