|
%I #5 Mar 31 2012 12:36:02
%S 2553,115979,2490449,80761059,2183297449,65652458491,1894624012417,
%T 56140705014995,1649002255383641,48754926946880491,
%U 1438991178016735921,42542454880958044611,1257346657004360967433,37177308864717054716635
%N Number of (n+1)X5 0..2 arrays with every 2X2 subblock singular
%C Column 4 of A185521
%H R. H. Hardin, <a href="/A185516/b185516.txt">Table of n, a(n) for n = 1..200</a>
%F Empirical: a(n)=61*a(n-1)-1038*a(n-2)-2374*a(n-3)+235515*a(n-4)-2269967*a(n-5)+4091988*a(n-6)+57111048*a(n-7)-371380096*a(n-8)+662678992*a(n-9)+937755776*a(n-10)-4856175360*a(n-11)+5080858624*a(n-12)+506806272*a(n-13)-2361655296*a(n-14)
%e Some solutions for 3X5
%e ..2..1..2..1..0....0..0..0..2..1....1..0..2..2..2....0..2..1..1..1
%e ..0..0..0..0..0....1..0..0..0..0....0..0..0..0..0....0..0..0..0..0
%e ..0..1..0..1..1....0..0..0..1..0....0..0..2..1..2....2..2..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 29 2011
| 