OFFSET
0,3
LINKS
J. Miller and V. Adamchik, Derivatives of the Hurwitz Zeta Function for Rational Arguments, Journal of Computational and Applied Mathematics 100 (1998) 201-206. [contains a large number of typos]
Eric Weisstein's World of Mathematics, Hurwitz Zeta Function, formula 23
FORMULA
EXAMPLE
-0.01396244731237074388034460444140926398857665998812431718484139757490...
MAPLE
evalf(Zeta(1, -1, 2/3), 120);
evalf(Pi/(18*sqrt(3)) - log(3)/72 - Psi(1, 1/3) / (12*sqrt(3)*Pi) - Zeta(1, -1)/3, 120);
MATHEMATICA
RealDigits[Derivative[1, 0][Zeta][-1, 2/3], 10, 120][[1]]
N[With[{k=1}, Sqrt[3] * (9^k - 1) * BernoulliB[2*k] * Pi / (9^k * 8*k) - 3*BernoulliB[2*k] * Log[3] / 9^k / 4 / k + (-1)^k * PolyGamma[2*k-1, 1/3] / 2 / Sqrt[3] / (6*Pi)^(2*k-1) - (9^k-3)*Zeta'[-2*k+1]/2/9^k], 120]
PROG
(PARI) zetahurwitz'(-1, 2/3) \\ Michel Marcus, Mar 24 2019
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Vaclav Kotesovec, Mar 23 2019
STATUS
approved