OFFSET
0,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..10000
Ovidiu Furdui, Problem 1870, Mathematics Magazine, Vol. 84, No. 2 (2011), p. 151; A double zeta sum, Solution to Problem 1870 by Joel Schlosberg, ibid., Vol. 85, No. 2 (2012), p. 156.
FORMULA
Equals Sum_{k,m>=1} k*(zeta(k+m)-1)/(k+m)^2 (Furdui, 2011). - Amiram Eldar, Jun 09 2022
EXAMPLE
0.288607832450766430303256045041201215521079667969961799402...
MAPLE
evalf(gamma/2) ;
MATHEMATICA
RealDigits[EulerGamma/2 , 10, 100][[1]] (* G. C. Greubel, Aug 31 2018 *)
PROG
(PARI) default(realprecision, 100); Euler/2 \\ G. C. Greubel, Aug 31 2018
(Magma) R:= RealField(100); EulerGamma(R)/2; // G. C. Greubel, Aug 31 2018
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Jan 26 2009
STATUS
approved