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%I #4 Mar 31 2012 12:36:06
%S 85438016,563483938112,1225810619871552,3676830716968217056,
%T 9921625782478580791520
%N Number of (n+1)X9 0..3 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
%C Column 8 of A186923
%e Some solutions for 3X9
%e ..0..1..0..1..1..1..0..2..3....0..1..0..1..1..1..0..1..2
%e ..0..0..0..1..0..1..1..3..2....0..0..0..1..0..1..0..2..1
%e ..0..0..0..0..0..2..1..2..1....0..0..0..0..0..2..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 28 2011