OFFSET
1,2
COMMENTS
Equals the Dirichlet zeta-function Sum_{n>=1} A000203(n)/n^s at s=3.
EXAMPLE
Equals 1.977304350297296118197085441485...
MAPLE
evalf(Zeta(2)*Zeta(3));
MATHEMATICA
RealDigits[Zeta[2] * Zeta[3], 10, 120][[1]] (* Amiram Eldar, Jun 12 2023 *)
PROG
(PARI) zeta(2)*zeta(3) \\ Charles R Greathouse IV, Mar 04 2015
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
R. J. Mathar, Jan 06 2011
STATUS
approved