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A009466
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Expansion of sin(ln(1+x)/cosh(x)).
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1
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0, 1, -1, -2, 6, 25, -165, -366, 6188, 5573, -294885, -813034, 35950266, -141917555, -1041102153, -22047494262, 843256939320, -9500491668343, 83224830490839, -2409782172431474, 68273680978437710, -1275838005728358495
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..100
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MATHEMATICA
| With[{nn=30}, CoefficientList[Series[Sin[Log[1+x]/Cosh[x]], {x, 0, nn}], x] Range[0, nn]!] (* From Harvey P. Dale, Nov 10 2011 *)
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CROSSREFS
| Sequence in context: A195259 A178087 A109286 * A032479 A029988 A050573
Adjacent sequences: A009463 A009464 A009465 * A009467 A009468 A009469
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KEYWORD
| sign,easy
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net)
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EXTENSIONS
| Extended with signs Mar 15 1997 by Olivier Gerard.
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