OFFSET
1,2
EXAMPLE
psi(5/9) = -1.71281664033951...
MATHEMATICA
RealDigits[PolyGamma[5/9], 10, 120][[1]] (* Amiram Eldar, Jun 14 2023 *)
PROG
(PARI) -psi(5/9) \\ Amiram Eldar, Jun 14 2023
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
R. J. Mathar, Jun 01 2022
STATUS
approved