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%I #4 Mar 31 2012 12:36:07
%S 72225,18740754,1921749372,245891941002,29716252404984,
%T 3703181282209854,456216633873575892,56423240969024815416
%N Number of (n+1)X7 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces
%C Column 6 of A187140
%e Some solutions for 4X7
%e ..1..0..1..2..2..2..0....1..1..2..0..2..2..2....1..0..0..0..1..1..0
%e ..0..0..1..2..1..1..1....0..0..0..0..2..2..1....0..0..1..0..0..2..2
%e ..0..0..0..0..0..1..0....0..0..0..1..1..2..1....0..0..0..0..1..1..1
%e ..0..0..0..1..1..2..0....0..0..0..1..1..1..0....0..0..0..1..2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 05 2011