OFFSET
1,7
FORMULA
It seems that if n > 1 then sum(k=1, n, a(kn)) > n*Log(Log(n)).
PROG
(PARI) a(n)=vecmin(vector(prime(n), k, abs(prime(n)-k*numdiv(k))))
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Aug 17 2002
STATUS
approved