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Search: id:A067653
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| A067653 |
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Denominators of the coefficients in exp(x/(1-x)) power series. |
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+0
2
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| 1, 2, 6, 24, 40, 720, 5040, 4480, 362880, 3628800, 13305600, 479001600, 6227020800, 29059430400, 1307674368000, 1609445376000, 13173608448000, 6402373705728000, 121645100408832000, 810967336058880000
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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K. Knopp "Theory and application of infinite series" Dover p. 547
O. Perron "Uber das infinitare Verhalten der koeffizienten einer gewissen Potenzreihe", Archiv d. math.u.Phys.(3), Vol. 22, pp. 329-340. 1914
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FORMULA
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a(n) is the denominator of sum(i=1, n, C(n-1, i-1)/i!)
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CROSSREFS
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Cf. A067764.
Sequence in context: A066332 A069141 A137326 this_sequence A090755 A004306 A092485
Adjacent sequences: A067650 A067651 A067652 this_sequence A067654 A067655 A067656
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KEYWORD
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nonn,frac
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 03 2002
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