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%I #5 Mar 31 2012 12:36:09
%S 10,24,2,948,36,190972,3020,194618700,929380,1018751442652,1744283776,
%T 27189851221308572,15262275217840
%N Number of (n+1)X(n+1) 0..1 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation
%C Column 1 of A187624
%e All solutions for 4X4
%e ..1..1..0..1....1..0..1..1
%e ..0..1..1..1....1..1..1..0
%e ..1..1..1..0....0..1..1..1
%e ..1..0..1..1....1..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 12 2011