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Number of (n+1)X(n+1) 0..4 arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero
0

%I #4 Mar 31 2012 12:36:08

%S 113,1590,34776,1655170,144075566

%N Number of (n+1)X(n+1) 0..4 arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero

%C Column 4 of A187521

%e Some solutions for 4X4

%e ..0..3..1..1....1..1..1..2....0..3..1..2....1..1..3..1....2..2..3..2

%e ..0..1..1..2....1..1..3..0....0..1..1..4....2..2..2..2....2..2..4..1

%e ..2..1..1..0....3..1..3..2....2..1..1..2....0..2..2..1....2..1..2..2

%e ..3..1..3..0....0..2..0..0....2..0..2..4....2..3..4..2....3..4..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 10 2011