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A207810 Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.

%I A207810 #7 Jul 22 2025 20:51:57
%S A207810 16,256,1232,9168,57184,382288,2485392,16340928,106947696,701265456,
%T A207810 4594672480,30114026544,197343497360,1293310030272,8475616206320,
%U A207810 55544979901904,364012404953344,2385549961744304,15633651159374128
%N A207810 Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.
%C A207810 Row 5 of A207808
%H A207810 R. H. Hardin, <a href="/A207810/b207810.txt">Table of n, a(n) for n = 1..210</a>
%F A207810 Empirical: a(n) = 3*a(n-1) +27*a(n-2) -10*a(n-3) -103*a(n-4) +48*a(n-5) +81*a(n-6) -29*a(n-7) -19*a(n-8) +2*a(n-9) +a(n-10)
%e A207810 Some solutions for n=4
%e A207810 ..1..1..0..1....1..1..0..1....1..0..1..0....0..1..0..1....1..0..1..1
%e A207810 ..1..1..0..1....0..1..1..0....0..1..0..1....1..0..1..1....0..1..1..0
%e A207810 ..1..0..1..0....0..1..1..0....0..1..0..1....1..0..1..0....0..1..1..0
%e A207810 ..1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..0....1..0..1..0
%e A207810 ..1..1..0..1....1..0..1..1....1..0..1..0....0..1..0..1....1..0..1..1
%K A207810 nonn
%O A207810 1,1
%A A207810 _R. H. Hardin_ Feb 20 2012