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A207604 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.

%I A207604 #7 Jul 22 2025 20:38:08
%S A207604 14,196,546,1521,10725,75625,292600,1132096,6404216,36228361,
%T A207604 159389139,701243361,3636529806,18858430276,87651752650,407394975625,
%U A207604 2035887257525,10174001088241,48443243140656,230661249751296,1134162648191664
%N A207604 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.
%C A207604 Row 7 of A207599
%H A207604 R. H. Hardin, <a href="/A207604/b207604.txt">Table of n, a(n) for n = 1..210</a>
%F A207604 Empirical: a(n) = a(n-1) -6*a(n-2) +31*a(n-3) +319*a(n-4) +270*a(n-5) +2100*a(n-6) -12600*a(n-8) -9720*a(n-9) -68904*a(n-10) -40176*a(n-11) +46656*a(n-12) -46656*a(n-13) +279936*a(n-14)
%e A207604 Some solutions for n=4
%e A207604 ..1..0..1..1....0..0..1..1....0..1..1..0....0..1..1..1....1..1..0..1
%e A207604 ..1..1..0..0....0..0..1..1....0..1..1..1....0..1..1..0....0..0..1..1
%e A207604 ..1..1..0..0....0..0..1..1....0..0..1..1....0..1..1..0....0..0..1..1
%e A207604 ..1..1..0..0....0..0..1..1....0..0..1..1....0..1..1..0....0..0..1..1
%e A207604 ..1..1..0..0....0..0..1..1....0..0..1..1....0..1..1..0....0..0..1..1
%e A207604 ..1..1..0..0....0..0..1..1....0..0..1..1....0..1..1..0....0..0..1..1
%e A207604 ..1..1..0..0....0..0..1..1....0..0..1..1....0..1..1..0....0..0..1..1
%K A207604 nonn
%O A207604 1,1
%A A207604 _R. H. Hardin_ Feb 19 2012