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Parity restrictions

Exponential generating functions

Set partitionsAny # of blocksOdd # of blocksEven # of blocks
Any block sizeseex−1e^{e^x - 1}sinh⁡(ex−1)\sinh(e^x - 1)cosh⁡(ex−1)\cosh(e^x - 1)
Odd block sizesesinh⁡xe^{\sinh x}sinh⁡(sinh⁡x)\sinh(\sinh x)cosh⁡(sinh⁡x)\cosh(\sinh x)
Even block sizesecosh⁡x−1e^{\cosh x - 1}sinh⁡(cosh⁡x−1)\sinh(\cosh x - 1)cosh⁡(cosh⁡x−1)\cosh(\cosh x - 1)

References

Flajolet, Sedgewick: Analytic Combinatorics

Comtet: Advanced Combinatorics

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