A118995 Number of real n X n symmetric (+1,-1) matrices with positive permanent.

1, 4, 32, 592, 11904, 1192384, 134217728

Offset

1,2

Links

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

Crossrefs

Cf. A086900, A118994, A118999.

Sequence in context: A219149 A013041 A006024 * A222829 A134087 A132854

Adjacent sequences: A118992 A118993 A118994 * A118996 A118997 A118998

Keyword

nonn,more

Author

Giovanni Resta, May 08 2006

Status

approved