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A118999 Number of real n X n symmetric (+1,-1) matrices with negative permanent. 2
0, 0, 32, 240, 11904, 533568, 134217728 (list; graph; refs; listen; history; text; internal format)
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 A070332

Adjacent sequences:  A118996 A118997 A118998 * A119000 A119001 A119002

KEYWORD

nonn,more

AUTHOR

Giovanni Resta, May 08 2006

STATUS

approved

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Last modified July 2 15:45 EDT 2020. Contains 335402 sequences. (Running on oeis4.)