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A090694 Number of permutations with self-conjugate cycle types. 0
1, 0, 3, 3, 20, 120, 210, 3640, 5264, 211680, 609840, 11517660, 68262480, 1000359360, 14082868800, 89182613520, 2391049140480, 13726429516800, 503669982816000, 2561900746204800, 134281295242698240, 983641429745694720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

There are 3 permutations of degree 3 with self-conjugate cycle type [1,2].

CROSSREFS

Cf. A000700.

Sequence in context: A131443 A157050 A059368 * A078431 A292953 A292221

Adjacent sequences:  A090691 A090692 A090693 * A090695 A090696 A090697

KEYWORD

easy,nonn

AUTHOR

Vladeta Jovovic, Dec 19 2003

EXTENSIONS

More terms from David Wasserman, Feb 02 2006

STATUS

approved

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Last modified January 18 20:19 EST 2018. Contains 297865 sequences.