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%I #5 Mar 31 2012 12:36:02
%S 580,11354,172026,3017724,50646550,873299900,14968118872,257702828288,
%T 4434550428074,76378569041134,1315590805788744,22665378299857764,
%U 390507753481807752,6728559224542235420,115937828489606023230
%N Number of (n+1)X3 0..3 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant
%C Column 2 of A185609
%H R. H. Hardin, <a href="/A185606/b185606.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 5X3
%e ..0..0..0....0..0..2....0..0..3....0..0..3....0..0..0....0..0..1....0..0..2
%e ..0..0..1....0..0..2....0..0..1....0..0..0....0..0..2....0..0..2....0..0..2
%e ..0..0..0....2..0..2....3..3..2....1..2..2....1..0..3....0..0..0....1..0..2
%e ..0..2..2....2..1..1....3..3..1....0..0..0....2..0..1....0..0..0....1..0..2
%e ..1..2..1....2..2..0....2..3..2....1..0..1....2..0..2....0..3..0....2..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 31 2011
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