OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
EXAMPLE
All primes are included.
MATHEMATICA
Flatten[Position[Table[GCD[w, PrimePi[w]], {w, 1, 256}], 1]
PROG
(PARI) isok(n) = gcd(n, primepi(n)) == 1; \\ Michel Marcus, Apr 22 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 16 2003
STATUS
approved