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A208837 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically.

%I A208837 #7 Jul 22 2025 21:30:57
%S A208837 16,256,768,2421,8736,33088,131355,533568,2203920,9189085,38550096,
%T A208837 162319248,685048923,2895251008,12247097568,51834040005,219453561408,
%U A208837 929308800928,3935800405563,16670184835968,70610452390128
%N A208837 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 0 vertically.
%C A208837 Column 5 of A208840
%H A208837 R. H. Hardin, <a href="/A208837/b208837.txt">Table of n, a(n) for n = 1..210</a>
%F A208837 Empirical: a(n) = 7*a(n-1) -8*a(n-2) -27*a(n-3) +45*a(n-4) +24*a(n-5) -51*a(n-6) -3*a(n-7) +16*a(n-8) -a(n-9) -a(n-10) for n>11
%e A208837 Some solutions for n=4
%e A208837 ..0..1..0..1..0....1..1..1..1..1....0..1..1..1..0....1..0..1..1..1
%e A208837 ..1..1..1..1..1....1..0..1..0..1....1..1..0..1..0....0..1..0..1..1
%e A208837 ..0..1..0..1..0....1..0..1..0..1....0..1..1..1..0....1..0..1..1..1
%e A208837 ..0..1..1..1..0....1..0..1..0..1....1..1..0..1..0....0..1..0..1..1
%K A208837 nonn
%O A208837 1,1
%A A208837 _R. H. Hardin_ Mar 01 2012