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A012669
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Expansion of tan(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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Table of n, a(n) for n=0..7.
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EXAMPLE
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tan(tanh(x)*tan(x))=2/2!*x^2+352/6!*x^6+1140992/10!*x^10...
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MATHEMATICA
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With[{nn=35}, Take[CoefficientList[Series[Tan[Tanh[x]*Tan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {3, -1, 4}]] (* Harvey P. Dale, Mar 22 2023 *)
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CROSSREFS
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Sequence in context: A064023 A179959 A024350 * A278926 A187523 A172860
Adjacent sequences: A012666 A012667 A012668 * A012670 A012671 A012672
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KEYWORD
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nonn,changed
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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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Previous Mathematica program replaced by Harvey P. Dale, Mar 22 2023
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STATUS
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approved
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