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A009807
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Expansion of tanh(tan(sin(x))).
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0
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1, -1, -7, 167, 1553, -238481, 4553, 1254638551, -35872740703, -17157807788193, 1532562286297113, 488815558185860999, -101586398550375052879, -24471009470566855107377, 10960094402513781594777321
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Tanh[Tan[Sin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Oct 24 2016 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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