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A012403
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E.g.f. tanh(arctan(x)*log(x+1))
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0
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2, -3, 0, -10, -32, 1596, -10080, 27936, -260928, 1924560, 33929280, -686630880, 4846421760, -42426084960, 778331473920, -1890071554560, -216298842931200, 4070252020032000, -41366803088056320
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OFFSET
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2,1
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LINKS
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Table of n, a(n) for n=2..20.
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EXAMPLE
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tanh(arctan(x)*log(x+1))=2/2!*x^2-3/3!*x^3-10/5!*x^5-32/6!*x^6...
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MATHEMATICA
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With[{nn=20}, Drop[CoefficientList[Series[Tanh[ArcTan[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!, 2]] (* Harvey P. Dale, Feb 28 2012 *)
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CROSSREFS
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Sequence in context: A256294 A279412 A012399 * A012655 A012650 A111606
Adjacent sequences: A012400 A012401 A012402 * A012404 A012405 A012406
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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Offset corrected by Harvey P. Dale, Feb 28 2012
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STATUS
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approved
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