The first few prime Wolstenholme numbers are 5, 266681, 40799043101, 86364397717734821, ... (OEIS A123751),
which occur at indices , 7, 13, 19, 121, 188, 252, 368, 605, 745, ... (OEIS A111354).
Savio, D. Y.; Lamagna, E. A.; and Liu, S.-M. "Summation of Harmonic Numbers." In Computers and Mathematics (Ed. E. Kaltofen
and S. M. Watt). New York: Springer-Verlag, pp. 12-20, 1989. https://doi.org/10.1007/978-1-4613-9647-5_2.Sloane,
N. J. A. Sequences A007406/M4004,
A111354, and A123751
in "The On-Line Encyclopedia of Integer Sequences."
th
Wolstenholme number is the numerator of the generalized
harmonic number 
in lowest terms, for a positive
integer 
.
These numbers occur in Wolstenholme's theorem.
The first few are 1, 5, 49, 205, 5269, 5369, 266681, 1077749, ... (OEIS A007406).
for prime 
, where 
is the 
th Wolstenholme number. In addition, 
for prime 
.
, 7, 13, 19, 121, 188, 252, 368, 605, 745, ... (OEIS A111354).
