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%I #5 Mar 31 2012 12:36:10
%S 256,8768,359488,15189800,1218772461
%N Half the number of (n+2)X(n+2) binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum
%C Diagonal of A187964
%e Some solutions for 4X4 with a(1,1)=0
%e ..0..1..1..1....0..0..1..1....0..0..0..1....0..0..0..1....0..0..0..0
%e ..0..1..0..1....1..1..1..1....0..1..1..1....1..1..0..1....1..1..1..0
%e ..1..0..1..1....0..0..0..0....0..1..1..1....0..1..0..1....0..1..1..0
%e ..0..0..1..0....1..1..0..0....1..1..1..0....0..1..0..1....0..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 16 2011
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