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A207749 Number of nX5 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

%I A207749 #7 Jul 22 2025 20:46:42
%S A207749 12,144,612,2100,8778,34668,147084,617732,2671488,11581700,50920910,
%T A207749 224964992,1001727900,4480199928,20136395180,90815818836,410932519010,
%U A207749 1864187195364,8476190423340,38611887901692,176175077736008
%N A207749 Number of nX5 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.
%C A207749 Column 5 of A207752
%H A207749 R. H. Hardin, <a href="/A207749/b207749.txt">Table of n, a(n) for n = 1..210</a>
%F A207749 Empirical: a(n) = 12*a(n-1) -15*a(n-2) -318*a(n-3) +989*a(n-4) +3432*a(n-5) -15290*a(n-6) -19128*a(n-7) +121738*a(n-8) +55524*a(n-9) -583550*a(n-10) -56016*a(n-11) +1776187*a(n-12) -141444*a(n-13) -3467035*a(n-14) +588186*a(n-15) +4252641*a(n-16) -950232*a(n-17) -3104320*a(n-18) +827568*a(n-19) +1200096*a(n-20) -369792*a(n-21) -181440*a(n-22) +62208*a(n-23) for n>24
%e A207749 Some solutions for n=4
%e A207749 ..1..0..1..0..1....0..0..0..0..0....1..0..1..0..0....1..1..1..1..1
%e A207749 ..0..1..0..1..0....0..1..0..1..0....0..0..0..0..0....0..1..0..1..0
%e A207749 ..1..1..1..1..1....0..1..0..0..0....1..0..1..0..0....1..1..1..1..1
%e A207749 ..0..0..0..0..0....0..1..0..1..0....1..0..0..0..0....1..1..1..1..0
%K A207749 nonn
%O A207749 1,1
%A A207749 _R. H. Hardin_ Feb 19 2012