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%I #4 Mar 29 2018 13:03:31
%S 8,34,40,64,111,219,443,904,1860,3856,8015,16659,34647,72088,150004,
%T 312144,649555,1351723,2812951,5853784,12181816,25350576,52755019,
%U 109784179,228462939,475435704,989390720,2058940864,4284695031
%N Number of 4Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Row 4 of A301964.
%H R. H. Hardin, <a href="/A301966/b301966.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 2*a(n-1) +a(n-3) -a(n-4) -2*a(n-6) +a(n-7) for n>9
%e Some solutions for n=5
%e ..0..0..1..0..1. .0..1..0..1..0. .0..0..1..0..1. .0..1..0..1..0
%e ..1..0..0..0..1. .0..1..0..1..0. .1..0..0..0..1. .0..1..0..0..0
%e ..1..0..1..1..1. .0..1..0..1..0. .1..0..1..1..1. .0..1..0..1..0
%e ..1..0..1..0..0. .1..0..1..0..1. .1..0..1..0..1. .0..1..0..1..0
%Y Cf. A301964.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 29 2018
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