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Search: id:A009153
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| A009153 |
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Expansion of cosh(sinh(x).exp(x)). |
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+0
1
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| 1, 0, 1, 6, 29, 140, 757, 4858, 36409, 302520, 2681769, 25018510, 245905365, 2559272196, 28264854685, 330408571202, 4065526003313, 52349977261040, 702393407898705, 9795673312888214, 141820637175889805
(list; graph; listen)
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OFFSET
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0,4
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FORMULA
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a(n) = Sum_{k=0..n} Stirling2(n, k)*(1+(-1)^k)/2*2^(n-k). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 26 2003
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MATHEMATICA
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Cosh[ Sinh[ x ]*Exp[ x ] ]
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CROSSREFS
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Cf. A009599, A065143.
Sequence in context: A026884 A110311 A030221 this_sequence A012325 A125785 A108982
Adjacent sequences: A009150 A009151 A009152 this_sequence A009154 A009155 A009156
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KEYWORD
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nonn,easy
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AUTHOR
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R. H. Hardin (rhh(AT)cadence.com)
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EXTENSIONS
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Extended and signs tested Mar 15 1997 by Olivier Gerard.
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