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%I #6 Sep 03 2022 22:51:48
%S 64,610,192,221,275,364,508,741,1118,1728,2715,4312,6896,11077,17842,
%T 28788,46499,75156,121524,196549,317942,514360,832171,1346400,2178440,
%U 3524709,5703018,9227596,14930483,24157948,39088300,63246117,102334286
%N Number of 7 X n 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Row 7 of A301790.
%H R. H. Hardin, <a href="/A301796/b301796.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 2*a(n-1) -a(n-3) for n>7.
%e Some solutions for n=5
%e ..0..1..0..1..0. .0..1..1..0..0. .0..1..0..1..0. .0..0..1..1..0
%e ..0..1..0..1..0. .0..0..1..1..0. .0..1..0..1..0. .1..0..0..1..1
%e ..1..0..1..0..1. .1..0..0..1..0. .0..1..0..1..0. .1..1..0..0..1
%e ..1..0..1..0..0. .1..1..0..1..0. .0..1..0..1..0. .0..1..1..0..0
%e ..1..0..1..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..0..1..1..0
%e ..1..0..0..1..0. .0..1..0..1..1. .0..1..0..1..1. .1..0..0..1..0
%e ..1..1..0..1..0. .0..1..0..0..1. .0..1..0..0..1. .1..1..0..1..0
%Y Cf. A301790.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 26 2018
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