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A012667
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Expansion of sin(tanh(x)*tan(x)).
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2
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OFFSET
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0,1
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LINKS
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FORMULA
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G.f.: sin(tanh(x)*tan(x)).
(* [ x^(4n+2) ] *)
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EXAMPLE
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sin(tanh(x)*tan(x)) = 2/2!*x^2-8/6!*x^6-159328/10!*x^10...
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Sin[Tanh[x]Tan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 4}]] (* Harvey P. Dale, Sep 16 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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EXTENSIONS
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Corrected by and prior Mathematica program replaced by Harvey P. Dale, Sep 16 2023
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STATUS
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approved
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