Provides functions for calculating harmonic numbers
Computes the generalized harmonic number of order n of m e.g. (1 + 1/2^m + 1/3^m + ... + 1/n^m)
n
m
(1 + 1/2^m + 1/3^m + ... + 1/n^m)
Computes the t-th harmonic number
t
