A119001 Minimal permanent of real n X n symmetric (+1,-1) matrices.

-1, 0, -6, -8, -120, -96, -5040, -4320, -362880

Offset

1,3

Links

Table of n, a(n) for n=1..9.

Formula

For odd n, a(n) = -n!. - Max Alekseyev, Jun 18 2025

Crossrefs

Cf. A118988, A118993, A118995, A118999, A119000, A119010.

Sequence in context: A211041 A236754 A069660 * A324987 A382959 A013239

Adjacent sequences: A118998 A118999 A119000 * A119002 A119003 A119004

Keyword

sign,more

Author

Giovanni Resta, May 08 2006

Status

approved