OFFSET
1,3
COMMENTS
For prime p, p^3 divides a(p), see A130681.
LINKS
Eric Weisstein's World of Mathematics, Wolstenholme's Theorem
Eric Weisstein's World of Mathematics, Harmonic Number
PROG
(PARI) a(n)=numerator(sum(i=1, n-1, 1/i^(2*n-1)))
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Ralf Stephan, Nov 10 2013
STATUS
approved