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A013542
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Numerator of the coefficient [x^(2n+1)] of the Taylor series sinh(cosec(x) - coth(x)).
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1
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-1, 53, 3341, 391337, 710371933, 6178130243, 225570264096917, 1546226961439379, 5665951032145572087083, -1602619428542796266047, 218332153959703843484481031721, -149315097238822774731841867
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OFFSET
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0,2
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COMMENTS
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A bisection of A013536. Denominators appear to be a bisection of A202382.
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LINKS
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EXAMPLE
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-x/6 + 53*x^3/1296 + 3341*x^5/6531840 + 391337*x^7/1410877440 + ...
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MATHEMATICA
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Numerator[Take[CoefficientList[Series[Sinh[Csc[x] - Coth[x]], {x, 0, 26}], x], {2, -1, 2}]] (* G. C. Greubel, Nov 13 2016 *)
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CROSSREFS
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KEYWORD
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sign,frac
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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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STATUS
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approved
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