A118999 Number of real n X n symmetric (+1,-1) matrices with negative permanent.

0, 0, 32, 240, 11904, 533568, 134217728

Offset

1,3

Links

Table of n, a(n) for n=1..7.

Crossrefs

Cf. A118997, A118995.

Sequence in context: A250748 A333268 A060622 * A321829 A111450 A351193

Adjacent sequences: A118996 A118997 A118998 * A119000 A119001 A119002

Keyword

nonn,more

Author

Giovanni Resta, May 08 2006

Status

approved