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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS A bisection of A013536. Denominators appear to be a bisection of A202382. LINKS G. C. Greubel, Table of n, a(n) for n = 0..193 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 A088784 Adjacent sequences: A013539 A013540 A013541 * A013543 A013544 A013545 KEYWORD sign,frac AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) EXTENSIONS Name edited by R. J. Mathar, Dec 21 2011 STATUS approved

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Last modified December 6 05:22 EST 2022. Contains 358594 sequences. (Running on oeis4.)