A080129 Number of primes less than n*10^20.

2220819602560918840, 4374267703076959271, 6503696293016202398, 8617821096373621600, 10720710117789005897, 12814731195053369962, 14901434779964228982, 16981914723713251575, 19056983802675654255, 21127269486018731928

Offset

1,1

Links

Chai Wah Wu, Table of n, a(n) for n = 1..47

Thomas R. Nicely, Some Results of Computational Research in Prime Numbers [See local copy in A007053]

Prog

(PARI) a(n)=primepi(10^20*n) \\ Charles R Greathouse IV, Apr 29 2015

Crossrefs

Cf. A038801, A028505, A038812, A038813, A038814, A038815, A038816, A038817, A038818, A038819, A038820, A038821, A080122, A080123, A080124, A080125, A080126, A080127, A080128, A116356.

Sequence in context: A281508 A281509 A115539 * A272519 A246234 A274814

Adjacent sequences: A080126 A080127 A080128 * A080130 A080131 A080132

Keyword

hard,nonn

Author

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

Extensions

a(7)-a(10) from Robert G. Wilson v, Feb 04 2006

Status

approved