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A012046
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arctan(sin(tanh(x)))=x-5/3!*x^3+121/5!*x^5-7013/7!*x^7+752785/9!*x^9...
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0
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1, -5, 121, -7013, 752785, -129763589, 32812992265, -11441858264741, 5261501926546081, -3084889329990554117, 2246121092328414171673, -1988316104656824914919653, 2102978545788269109358313521
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history;
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internal format)
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[ArcTan[Sin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Sep 01 2023 *)
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CROSSREFS
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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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STATUS
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approved
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