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A012668
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arcsin(tanh(x)*tan(x))=2/2!*x^2+232/6!*x^6+647072/10!*x^10...
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0
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2, 232, 647072, 11510902912, 730537735434752, 121024350517590894592, 43334092203148352120594432, 29569225337018517420748948406272, 35135401746397350937514453454595162112, 67930055172164174273112190776969951565053952
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OFFSET
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0,1
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LINKS
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MATHEMATICA
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With[{nn=60}, Take[CoefficientList[Series[ArcSin[Tanh[x]Tan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 4}]] (* Harvey P. Dale, Sep 21 2018 *)
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CROSSREFS
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KEYWORD
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nonn
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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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STATUS
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approved
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