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%I #6 Mar 31 2012 12:36:08
%S 175,1969,6512,44512,319792,2142214,13328138,88129302,580578920,
%T 3802787570,24886205614,163501852210,1072581861748,7032866591748,
%U 46126761827268,302624532393770,1985178392452142,13021958891247156
%N Number of (n+1)X3 0..2 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants
%C Column 2 of A187425
%H R. H. Hardin, <a href="/A187420/b187420.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 5X3
%e ..1..1..1....2..0..2....1..2..1....2..1..0....2..1..0....1..1..0....1..2..1
%e ..2..1..0....2..2..2....0..1..1....1..1..1....0..1..2....2..2..0....0..0..0
%e ..1..1..1....0..2..0....0..1..1....2..1..0....0..1..2....0..2..2....1..2..1
%e ..2..2..2....0..0..0....1..1..1....2..1..2....0..1..2....1..2..1....1..1..0
%e ..0..0..0....2..0..0....1..0..0....0..0..2....2..1..0....1..2..1....0..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 09 2011
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