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A084297
Primes p=prime(m) such that pi(m*p)/m is an integer.
2
2, 5, 211, 457, 1223, 3943, 130259, 167953, 468473, 721159, 927317, 2026061, 7066487
OFFSET
1,1
FORMULA
a(n) = prime(A084295(n)).
MATHEMATICA
Do[s=PrimePi[n*Prime[n]]/n; If[IntegerQ[s], Print[Prime[n]]], {n, 1, 100000}]
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Labos Elemer, May 27 2003
EXTENSIONS
Name edited by Michel Marcus, Aug 30 2019
a(9)-a(12) from Giovanni Resta, Sep 02 2019
a(13) from Chai Wah Wu, May 14 2020
STATUS
approved