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A080129 Number of primes less than n*10^20. 20
2220819602560918840, 4374267703076959271, 6503696293016202398, 8617821096373621600, 10720710117789005897, 12814731195053369962, 14901434779964228982, 16981914723713251575, 19056983802675654255, 21127269486018731928 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

Thomas R. Nicely, Some Results of Computational Research in Prime Numbers

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

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Last modified December 12 07:00 EST 2019. Contains 329948 sequences. (Running on oeis4.)