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%I #4 Mar 31 2012 12:36:06
%S 166272,86388160,15491352288,3861027028096,833994044863296,
%T 193942830390429600,43448233709038001344,9921625782478580791520
%N Number of (n+1)X6 0..3 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
%C Column 5 of A186923
%e Some solutions for 3X6
%e ..0..3..2..2..3..2....0..2..2..3..0..1....0..0..2..0..2..3....0..3..3..3..2..1
%e ..0..0..1..2..3..2....0..0..3..3..2..2....0..0..0..0..2..1....0..0..3..3..1..2
%e ..0..0..0..3..2..1....0..0..0..0..0..0....0..0..0..3..3..1....0..0..0..3..1..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 28 2011