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A090694
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Number of permutations with self-conjugate cycle types.
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0
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1, 0, 3, 3, 20, 120, 210, 3640, 5264, 211680, 609840, 11517660, 68262480, 1000359360, 14082868800, 89182613520, 2391049140480, 13726429516800, 503669982816000, 2561900746204800, 134281295242698240, 983641429745694720
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OFFSET
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1,3
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LINKS
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EXAMPLE
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There are 3 permutations of degree 3 with self-conjugate cycle type [1,2].
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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