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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
OFFSET
1,3
EXAMPLE
There are 3 permutations of degree 3 with self-conjugate cycle type [1,2].
CROSSREFS
Cf. A000700.
Sequence in context: A304562 A157050 A059368 * A078431 A346750 A292953
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Dec 19 2003
EXTENSIONS
More terms from David Wasserman, Feb 02 2006
STATUS
approved