A118988
Number of different values taken by the permanent of a symmetric real (+1,-1)-matrix of order n.
Original entry on oeis.org
1, 2, 2, 4, 7, 15, 20, 62, 190, 771, 2073
Offset: 0
Cf.
A006125 (number of symmetric real (+1,-1)-matrices of order (n-1)).
A118985
Number of different values taken by the determinant of a symmetric real (0,1)-matrix of order n.
Original entry on oeis.org
1, 2, 3, 5, 7, 11, 19, 40, 91, 214, 577
Offset: 0
Cf.
A006125 (number of symmetric real (0,1)-matrices of order (n-1)).
A118991
Number of real n X n symmetric (0,1) matrices with nonzero permanent.
Original entry on oeis.org
1, 5, 39, 753, 25887, 1842241, 247531775, 65994415105, 34412945590783
Offset: 1
A118998
Minimal determinant of real n X n symmetric (0,1) matrices.
Original entry on oeis.org
0, -1, -2, -3, -5, -9, -32, -56, -128, -320
Offset: 1
A118989
Number of symmetric n X n (0,1)-matrices over the reals with zero permanent.
Original entry on oeis.org
1, 3, 25, 271, 6881, 254911, 20903681, 2725061631, 771426498049
Offset: 1
A119009
Number of n X n real symmetric (0,1)-matrices with permanent = 1.
Original entry on oeis.org
1, 4, 22, 286, 5126, 190096, 9477868, 923926396, 118222774300
Offset: 1
Showing 1-6 of 6 results.