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%I #5 Mar 31 2012 12:36:01
%S 0,148,4740,431655,92026207,51354095605,70588969710949,
%T 246617622494198862,2154931835018459820138,47474118606355438067066326
%N Number of (n+1)X(n+1) binary arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant
%C Diagonal of A185487
%e Some solutions for 3X3
%e ..1..1..0....1..0..0....1..0..1....0..0..0....0..0..1....1..0..0....0..1..0
%e ..0..0..0....1..0..0....1..0..0....0..0..0....0..0..0....1..1..0....1..1..0
%e ..1..1..1....1..0..1....0..0..1....1..1..0....0..0..1....0..1..0....1..0..0
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 28 2011
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