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Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace
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%I #5 Mar 31 2012 12:36:03

%S 0,1773,424197,560733777,3293066139075,91469611366917651

%N Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace

%C Diagonal of A185845

%e Some solutions for 3X3

%e ..0..1..0....1..2..2....0..0..2....0..2..2....2..0..1....0..0..1....1..0..2

%e ..2..1..0....0..0..0....0..1..1....0..1..0....0..0..1....0..1..2....2..1..2

%e ..1..0..1....1..1..2....2..1..0....1..1..1....1..2..1....2..1..1....2..1..2

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 05 2011