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Search: id:A053531
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A053531 E.g.f.: (1-x)^(-1/2*x)*exp(-1/2*x^2-1/4*x^3-1/8*x^4). +0
1
1, 0, 0, 0, 1, 15, 72, 420, 2915, 24570, 245070, 2633400, 30588783, 383841315, 5197243590, 75666140550, 1177491151785, 19496256883740, 342184849138188, 6346249258076280, 124023565540658025, 2547445128977720475, 54865546632888272820 (list; graph; listen)
OFFSET

0,6

REFERENCES

R. P. Stanley, Enumerative Combinatorics, Cambridge, Vol. 2, 1999; see Problem 5.15(c).

CROSSREFS

Sequence in context: A000475 A145053 A126274 this_sequence A000476 A105451 A002603

Adjacent sequences: A053528 A053529 A053530 this_sequence A053532 A053533 A053534

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Jan 16 2000

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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