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A207485 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 1 0 vertically.

%I A207485 #7 Jul 22 2025 20:29:13
%S A207485 13,169,499,1322,4041,12151,39050,126411,423951,1437618,4974835,
%T A207485 17381451,61478628,219050691,786599271,2839798658,10305461639,
%U A207485 37542605947,137251905940,503176001107,1849256209667,6809974286746,25122207285003
%N A207485 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 1 0 vertically.
%C A207485 Column 5 of A207488
%H A207485 R. H. Hardin, <a href="/A207485/b207485.txt">Table of n, a(n) for n = 1..210</a>
%F A207485 Empirical: a(n) = 10*a(n-1) +3*a(n-2) -319*a(n-3) +570*a(n-4) +4375*a(n-5) -12102*a(n-6) -33910*a(n-7) +122896*a(n-8) +163430*a(n-9) -765272*a(n-10) -501760*a(n-11) +3186635*a(n-12) +928246*a(n-13) -9216729*a(n-14) -691675*a(n-15) +18785794*a(n-16) -1206433*a(n-17) -26966924*a(n-18) +4392278*a(n-19) +26904794*a(n-20) -6452612*a(n-21) -18149412*a(n-22) +5510570*a(n-23) +7897352*a(n-24) -2815136*a(n-25) -2054612*a(n-26) +816504*a(n-27) +282560*a(n-28) -120480*a(n-29) -15552*a(n-30) +6912*a(n-31) for n>32
%e A207485 Some solutions for n=4
%e A207485 ..1..1..1..1..0....1..0..1..0..1....1..1..1..1..0....1..0..1..0..0
%e A207485 ..1..1..0..1..0....0..1..0..0..1....1..1..1..0..0....0..1..0..0..1
%e A207485 ..1..1..1..1..0....0..0..1..0..1....1..1..1..1..0....0..0..1..0..0
%e A207485 ..1..1..0..1..0....1..1..0..0..1....1..1..1..0..1....0..1..0..1..0
%K A207485 nonn
%O A207485 1,1
%A A207485 _R. H. Hardin_ Feb 18 2012