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%I #5 Mar 31 2012 12:36:03
%S 81,7074,2046098,2171002788,7861640359954
%N Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum
%C Diagonal of A185777
%e Some solutions for 3X3
%e ..2..1..2....0..0..1....2..0..0....2..1..1....1..2..1....1..1..0....2..1..1
%e ..0..2..2....1..1..2....1..1..0....2..0..1....0..1..2....1..0..0....0..0..0
%e ..0..1..0....0..1..1....2..2..1....1..1..0....2..0..1....2..1..1....0..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 03 2011