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A013542
Numerator of the coefficient [x^(2n+1)] of the Taylor series sinh(cosec(x) - coth(x)).
1
-1, 53, 3341, 391337, 710371933, 6178130243, 225570264096917, 1546226961439379, 5665951032145572087083, -1602619428542796266047, 218332153959703843484481031721, -149315097238822774731841867
OFFSET
0,2
COMMENTS
A bisection of A013536. Denominators appear to be a bisection of A202382.
LINKS
EXAMPLE
-x/6 + 53*x^3/1296 + 3341*x^5/6531840 + 391337*x^7/1410877440 + ...
MATHEMATICA
Numerator[Take[CoefficientList[Series[Sinh[Csc[x] - Coth[x]], {x, 0, 26}], x], {2, -1, 2}]] (* G. C. Greubel, Nov 13 2016 *)
CROSSREFS
Sequence in context: A243231 A280357 A300406 * A200917 A234630 A370294
KEYWORD
sign,frac
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Name edited by R. J. Mathar, Dec 21 2011
STATUS
approved