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Search: id:A087906
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A087906 Sum_{d|n} (n-1)!/(d-1)!. +0
1
1, 2, 3, 13, 25, 301, 721, 10921, 60481, 740881, 3628801, 106777441, 479001601, 12462690241, 134399865601, 2833553923201, 20922789888001 (list; graph; listen)
OFFSET

1,2

FORMULA

E.g.f.: Sum_{k>0} (exp(x^k)-1)/k or -Sum_{k>0} ln(1-x^k)/k!.

CROSSREFS

Cf. A057625, A061095, A038041, A038048, A005225.

Sequence in context: A103150 A065723 A024779 this_sequence A029737 A105891 A106867

Adjacent sequences: A087903 A087904 A087905 this_sequence A087907 A087908 A087909

KEYWORD

nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 15 2003

page 1

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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