OFFSET
0,1
EXAMPLE
psi(6/7) = -0.84039587773067...
MATHEMATICA
RealDigits[PolyGamma[6/7], 10, 120][[1]] (* Amiram Eldar, Jun 14 2023 *)
PROG
(PARI) -psi(6/7) \\ Amiram Eldar, Jun 14 2023
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Jun 01 2022
STATUS
approved