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%I #4 Mar 27 2018 14:36:20
%S 64,8192,132971,3518619,77396422,1812097252,41966406867,972282892539,
%T 22595595313115,524762543383531,12194289128927894,283431884166143510,
%U 6588576515306179215,153173958754721101279,3561231247509661888958
%N Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Row 7 of A301841.
%H R. H. Hardin, <a href="/A301847/b301847.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
%e ..1..1..1..0..0. .1..1..1..0..0. .1..1..1..0..0. .1..1..1..0..0
%e ..0..0..1..0..0. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..1..0
%e ..0..0..1..1..0. .0..0..1..1..0. .0..0..1..0..0. .0..0..0..0..1
%e ..0..0..0..1..1. .0..0..0..1..0. .1..0..1..1..1. .1..1..1..0..0
%e ..1..1..0..0..0. .1..0..1..0..1. .0..0..0..0..1. .0..0..1..1..0
%e ..1..0..1..1..0. .0..1..1..1..0. .1..1..0..0..1. .0..0..1..1..1
%Y Cf. A301841.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 27 2018
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