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A084298 Integer quotients pi(m*prime(m))/m. 2
1, 2, 26, 48, 108, 292, 6471, 8147, 20745, 30803, 38806, 79760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

FORMULA

a(n) = A000720(A084295(n)*A084297(n))/A084295(n).

MATHEMATICA

Do[s=PrimePi[n*Prime[n]]/n; If[IntegerQ[s], Print[s]], {n, 1, 100000}]

CROSSREFS

Cf. A000040, A000720, A057855, A084295, A084297.

Sequence in context: A050905 A067571 A319486 * A001772 A199206 A132861

Adjacent sequences:  A084295 A084296 A084297 * A084299 A084300 A084301

KEYWORD

nonn,more

AUTHOR

Labos Elemer, May 27 2003

EXTENSIONS

a(9)-a(12) from Giovanni Resta, Sep 02 2019

STATUS

approved

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Last modified November 19 03:40 EST 2019. Contains 329310 sequences. (Running on oeis4.)