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A112932 Denominator of rational values arising in an asymptotic formula for 1/(zeta(s)-1) as s-->infinity. 2
1, 3, 1, 9, 5, 3, 27, 7, 15, 9, 5, 81, 21, 11, 45, 25, 13, 27, 7, 15, 243, 63, 33, 135, 17, 35, 9, 75, 19, 39, 81, 21, 11, 45, 729, 23, 189, 49, 99, 25, 405, 51, 13, 105, 27, 55, 225, 57, 29, 117, 15, 243, 31, 125, 63, 65, 33, 135 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..57.

Andrei Vieru, Euler constant as a renormalized value of Riemann zeta function at its pole. Rationals related to Dirichlet L-functions, arXiv:1306.0496 [math.GM], 2015.

EXAMPLE

1/(zeta(s)-1)=2^s-(4/3)^s-1+(8/9)^s-(4/5)^s+(2/3)^s-(16/27)^s-(4/7)^s+2*(8/15)^s-2*(4/9)^s+(2/5)^s+(32/81)^s+2*(8/21)^s-(4/11)^s-3*(16/45)^s+o((16/45)^x) and here sequence consists of denominators of 2/1,4/3,1/1,8/9,4/5,...

MATHEMATICA

nmax = 20; lz = ConstantArray[0, nmax]; ax = 0; Do[le = Exp[Limit[Log[Abs[(1/(Zeta[x] - 1) - ax)]]/x, x -> Infinity]]; ls = Limit[(1/(Zeta[x] - 1) - ax)/le^x, x -> Infinity]; ax = ax + ls*le^x; lz[[j]] = le; , {j, 1, nmax}]; Denominator[lz] (* Vaclav Kotesovec, Aug 11 2019 *)

CROSSREFS

Cf. A112931, A112933.

Sequence in context: A050155 A270236 A140714 * A337680 A077895 A105539

Adjacent sequences:  A112929 A112930 A112931 * A112933 A112934 A112935

KEYWORD

frac,more,nonn

AUTHOR

Benoit Cloitre, Oct 06 2005

EXTENSIONS

a(15)-a(33) computed by Andrei Vieru, added by Vaclav Kotesovec, Aug 11 2019

Terms a(34) and beyond from Vaclav Kotesovec, Aug 11 2019

STATUS

approved

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Last modified May 12 07:28 EDT 2021. Contains 343821 sequences. (Running on oeis4.)