OFFSET
1,1
COMMENTS
LINKS
R. J. McIntosh, On the converse of Wolstenholme's theorem, Acta Arithmetica, Vol. 71, No. 4 (1995), 381-389.
PROG
(PARI) a(n) = my(p=2); while(Mod(binomial(2*p-1, p-1), p^n)!=1, p=nextprime(p+1)); p
CROSSREFS
KEYWORD
nonn,hard,more,bref
AUTHOR
Felix Fröhlich, Oct 18 2015
STATUS
approved