A080122 Number of primes less than n*10^13.

346065536839, 675895909271, 1000121668853, 1320811971702, 1638923764567, 1955010428258, 2269432871304, 2582444113487, 2894232250783, 3204941750802, 3514687156436, 3823561506566, 4131641836725, 4438993433550, 4745670621117

Offset: 1

Author

Robert G. Wilson v and Jeff Burch, Jan 29 2003

Keywords

• nonn

Links

• Robert G. Wilson v, Table of n, a(n) for n = 1..10000
• Thomas R. Nicely, Some Results of Computational Research in Prime Numbers [See local copy in A007053]
• Tomás Oliveira e Silva, Tables of values of pi(x) and of pi2(x)
• Andrew R. Booker, The Nth Prime Page

Crossrefs

Cf. A038801, A028505, A038812, A038813, A038814, A038815, A038816, A038817, A038818, A038819, A038820, A038821, A080123, A080124, A080125, A080126, A080127, A080128, A080129.

Programs

Mathematica

Table[ PrimePi[ n*10^13 ], {n, 1, 9}]

PARI

a(n)=primepi(10^13*n) \\ Charles R Greathouse IV, Apr 29 2015