DirichletL
DirichletL[k, j, s] gives the Dirichlet L-function L(χ, s) for the Dirichlet character χ(n) with modulus k and index j.
Examples
Evaluate L-function:
DirichletL[4, 2, 1]
(* Pi/4 *)Numerical evaluation:
N[DirichletL[5, 2, 2]]Please visit the official Wolfram Language Reference for more details.