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%I #5 Mar 31 2012 12:35:53
%S 31800,4760784,710460576,106093597920,15840740585184,2365244332190880,
%T 353161421431958880,52731638795200916256,7873523002759947918432,
%U 1175620025708806400583456,175535451188975807239481952
%N Number of (n+1)X4 0..3 arrays with every 2X2 subblock nonsingular
%C Column 3 of A183710
%H R. H. Hardin, <a href="/A183704/b183704.txt">Table of n, a(n) for n = 1..200</a>
%F Empirical: a(n)=86*a(n-1)+8599*a(n-2)+136224*a(n-3)-1175256*a(n-4)-18016864*a(n-5)+130578912*a(n-6)-84468528*a(n-7)-318225024*a(n-8)
%e Some solutions for 3X4
%e ..0..2..0..2....0..2..0..3....0..2..2..2....0..2..0..1....0..2..2..0
%e ..1..2..2..3....3..0..1..1....1..0..3..1....3..3..3..2....2..0..1..1
%e ..2..2..1..1....2..3..0..1....0..3..2..1....1..2..3..3....3..3..1..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 06 2011
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