DirichletEta

DirichletEta[s] gives the Dirichlet eta function η(s).

Examples

Evaluate at specific points:

DirichletEta[2]
(* Pi^2/12 *)

Related to Riemann zeta:

DirichletEta[s] == (1 - 2^(1 - s)) Zeta[s]

Please visit the official Wolfram Language Reference for more details.