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%I #4 Mar 31 2012 12:36:09
%S 64,2924,390,12278892,4232368
%N Number of (n+1)X(n+1) 0..3 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation
%C Column 3 of A187624
%e Some solutions for 4X4
%e ..1..0..2..3....1..1..0..1....1..3..2..3....2..1..0..2....1..2..1..2
%e ..3..1..1..1....0..1..1..1....0..1..1..1....0..1..1..2....0..1..1..1
%e ..1..1..1..3....1..1..1..0....1..1..1..0....1..1..1..1....1..1..1..0
%e ..3..2..0..1....2..1..2..1....3..2..3..1....2..0..1..3....2..1..2..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 12 2011
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