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%I #5 Mar 31 2012 12:36:11
%S 0,128,3784,321696,53468700,21615769428
%N Number of (n+1)X(n+1) binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums
%C Diagonal of A188311
%e Some solutions for 3X3
%e ..1..1..1....1..0..1....0..1..0....0..1..1....0..1..0....0..1..1....1..1..0
%e ..1..1..0....1..1..0....0..1..0....1..0..0....0..1..1....1..0..1....0..0..1
%e ..1..1..1....0..1..0....1..0..1....0..0..1....0..1..0....0..1..1....1..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Mar 27 2011
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