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A009599
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Expansion of sinh(sinh(x).exp(x)).
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1
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0, 1, 2, 5, 20, 117, 782, 5441, 39496, 306921, 2602682, 24116413, 241121564, 2561633245, 28613237382, 334511450617, 4089814554384, 52302564139985, 699179303859698, 9751200460426357, 141494250613386916
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| a(n) = Sum_{k=0..n} Stirling2(n, k)*(1-(-1)^k)/2*2^(n-k). - Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 26 2003
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MATHEMATICA
| Sinh[ Sinh[ x ]*Exp[ x ] ]
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CROSSREFS
| Cf. A065143.
Sequence in context: A168357 A052850 A000130 * A112833 A144503 A012321
Adjacent sequences: A009596 A009597 A009598 * A009600 A009601 A009602
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KEYWORD
| nonn,easy
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net)
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EXTENSIONS
| Extended and signs tested Mar 15 1997 by Olivier Gerard.
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