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A013531 Numerator of [x^(2n+1)] in the Taylor expansion arcsin(cosec(x) - cosech(x)) = x/3 + x^3/162 + 5*x^5/1134 + 19*x^7/76545 + 13793*x^9/218245104 + ... 1
1, 1, 5, 19, 13793, 7487, 235549, 4400752781, 1455564577, 75143281206379, 17910727755514921, 208450205999558953, 8864292850179951461, 36884532202496983982602507 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
Select[Numerator[CoefficientList[Series[ArcSin[1/Sin[x] - 1/Sinh[x]], {x, 0, 52}], x]], # != 0 &] (* G. C. Greubel, Nov 11 2016 *)
CROSSREFS
Cf. A068917.
Sequence in context: A280034 A270486 A278562 * A357517 A122152 A104314
KEYWORD
nonn,frac
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Name edited by R. J. Mathar, Dec 20 2011
STATUS
approved

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Last modified May 23 06:14 EDT 2024. Contains 372760 sequences. (Running on oeis4.)