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%I #5 Mar 31 2012 12:36:01
%S 260268,13313404,681288932,34797264276,1778231844136,90873049503556,
%T 4643641622051596,237295567539569352,12126082907249375676,
%U 619655984740726276728,31665112274179396900624,1618122571180552272792264
%N Number of (n+2)X4 0..2 arrays with each 3X3 subblock nonsingular
%C Column 2 of A184784
%H R. H. Hardin, <a href="/A184781/b184781.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 6X4
%e ..0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0
%e ..1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1
%e ..0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0
%e ..0..1..0..2....2..1..0..0....0..2..0..1....1..1..2..0....0..1..2..1
%e ..1..2..0..1....1..2..2..1....1..0..0..2....2..0..0..2....2..2..0..1
%e ..0..1..2..0....0..1..2..0....1..1..2..2....0..2..2..0....1..2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 21 2011
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