Wolstenholme number
In mathematics, a Wolstenholme number is a number that is the numerator of the Harmonic number#Generalized [harmonic numbers|generalized harmonic number] Hn,2.
The first such numbers are 1, 5, 49, 205, 5269, 5369, 266681, 1077749,....
These numbers are named after Joseph Wolstenholme, who proved Wolstenholme's theorem on modular relations of the generalized harmonic numbers.