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 A012861 Numerator of the coefficient of [x^(2n)] of the Taylor series log(cosec(x)*arctanh(x))= x^2/2 +3*x^4/20 +4*x^6/45 +203*x^8/3240 +2038*x^10/42525 +... 1
 1, 3, 4, 203, 2038, 319561, 61425307, 8552625673, 11620410478, 16155306808034, 1810024463827637, 147005475101499533, 139995370486066058107, 7441717839455761431719, 66171433716055691335387 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The inner function is cosec(x)*arctanh(x) = 1+ x^2/2 +11*x^4/40 +133*x^6/720 +36211*x^8/259200 +1226971*x^10/10886400 +... LINKS Table of n, a(n) for n=1..15. CROSSREFS Cf. A202602 (denominators) Sequence in context: A042081 A245456 A042275 * A349885 A042485 A111315 Adjacent sequences: A012858 A012859 A012860 * A012862 A012863 A012864 KEYWORD nonn,frac AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) EXTENSIONS Values replaced by numerators. - R. J. Mathar, Dec 20 2011 STATUS approved

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Last modified July 21 02:16 EDT 2024. Contains 374462 sequences. (Running on oeis4.)