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Search: id:A003724
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| A003724 |
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Number of partitions of n-set into odd blocks.
(Formerly M1427)
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+0
17
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| 1, 1, 1, 2, 5, 12, 37, 128, 457, 1872, 8169, 37600, 188685, 990784, 5497741, 32333824, 197920145, 1272660224, 8541537105, 59527313920, 432381471509, 3252626013184, 25340238127989, 204354574172160, 1699894200469849
(list; graph; listen)
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OFFSET
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0,4
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
L. Comtet, Analyse Combinatoire, Presses Univ. de France, 1970, Vol. II, pages 61-62.
L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 225, 2nd line of table.
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LINKS
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T. D. Noe, Table of n, a(n) for n=0..100
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FORMULA
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E.g.f.: exp ( sinh x ).
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MATHEMATICA
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Exp[ Sinh[ x ] ]
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CROSSREFS
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Cf. A000009, A000110.
Sequence in context: A009598 A002216 A024717 this_sequence A138314 A115277 A130221
Adjacent sequences: A003721 A003722 A003723 this_sequence A003725 A003726 A003727
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KEYWORD
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nonn,nice,easy
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AUTHOR
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R. H. Hardin (rhhardin(AT)att.net)
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