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A012128
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arcsinh(arcsin(tanh(x)))=x-2/3!*x^3+24/5!*x^5-776/7!*x^7+49536/9!*x^9...
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0
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1, -2, 24, -776, 49536, -5271936, 842846848, -188826614016, 56431158829056, -21687384462233600, 10419278733341491200, -6118220781221123260416, 4311116228906909580820480, -3590017073187013127497383936
(list;
graph;
refs;
listen;
history;
text;
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[ArcSinh[ArcSin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Aug 03 2021 *)
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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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