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A118995 Number of real n X n symmetric (+1,-1) matrices with positive permanent. +0
4
1, 4, 32, 592, 11904, 1192384, 134217728 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Cf. A086900, A118994, A118999.

Adjacent sequences: A118992 A118993 A118994 this_sequence A118996 A118997 A118998

Sequence in context: A012509 A013041 A006024 this_sequence A134087 A132854 A136471

KEYWORD

nonn,more

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), May 08 2006

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Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.

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