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 A247621 Decimal expansion of Sum_{k>=1} 1/(2*k)-tanh(1/(2*k)). 1
 0, 4, 6, 1, 5, 1, 4, 5, 1, 3, 0, 5, 9, 1, 4, 2, 0, 8, 8, 4, 6, 5, 6, 8, 3, 8, 3, 5, 4, 1, 7, 4, 6, 7, 4, 7, 2, 8, 2, 7, 4, 9, 5, 5, 9, 7, 4, 7, 1, 0, 5, 3, 7, 8, 1, 4, 7, 8, 9, 0, 9, 7, 0, 3, 8, 0, 2, 8, 3, 4, 5, 1, 1, 2, 4, 8, 7, 9, 5, 2, 0, 1, 9, 8, 2, 7, 0, 4, 0, 5, 0, 1, 1, 8, 8, 9, 5, 0, 1, 2, 6, 8, 8, 9, 7, 2 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Philippe Flajolet, Éric Fusy, Xavier Gourdon, Daniel Panario and Nicolas Pouyanne, A Hybrid of Darboux's Method and Singularity Analysis in Combinatorial Asymptotics, arXiv:math.CO/0606370, p. 18 EXAMPLE 0.04615145130591420884656838354174674728274955974710537814789097038... MAPLE evalf(sum(1/(2*k)-tanh(1/(2*k)), k=1..infinity), 120) PROG (PARI) default(realprecision, 150); sumpos(k=1, (1/(2*k)-tanh(1/(2*k)))) CROSSREFS Cf. A003483. Sequence in context: A343624 A309445 A051261 * A245275 A030169 A263180 Adjacent sequences:  A247618 A247619 A247620 * A247622 A247623 A247624 KEYWORD nonn,cons AUTHOR Vaclav Kotesovec, Sep 21 2014 STATUS approved

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Last modified May 16 21:28 EDT 2021. Contains 343951 sequences. (Running on oeis4.)