See also Tau Function
References
Spira, R. ``Calculation of the Ramanujan Tau-Dirichlet Series.'' Math. Comput. 27, 379-385, 1973.
Yoshida, H. ``On Calculations of Zeros of L-Functions Related with Ramanujan's Discriminant Function on the Critical
Line.'' J. Ramanujan Math. Soc. 3, 87-95, 1988.