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%I #5 Mar 31 2012 12:36:02
%S 0,128,5936,1020072,512228678,835833221744
%N Number of (n+1)X(n+1) binary arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum
%C Diagonal of A185497
%e Some solutions for 4X4
%e ..0..1..1..1....0..0..0..0....1..0..0..1....1..0..0..0....1..1..1..1
%e ..0..1..1..1....1..1..1..1....0..0..1..1....0..1..1..1....1..0..0..0
%e ..1..0..1..0....0..0..0..0....1..1..1..0....1..1..0..1....1..1..1..1
%e ..1..0..1..0....1..1..0..1....0..0..1..1....0..1..0..1....0..1..0..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 29 2011
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