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A012568
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arctanh(sinh(x)*cos(x))=x-20/5!*x^5-560/7!*x^7-7920/9!*x^9...
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0
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1, 0, -20, -560, -7920, 1034880, 172569280, 12339608320, -1902800305920, -1037015219466240, -208832669083243520, 24402030281141555200, 43057075784745711636480, 18939654540025835056496640
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OFFSET
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0,3
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LINKS
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FORMULA
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[ArcTanh[Sinh[x]Cos[x]], {x, 0, nn}], x] Range[ 0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jun 22 2022 *)
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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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