A028505 Number of primes <= 100*n.

25, 46, 62, 78, 95, 109, 125, 139, 154, 168, 184, 196, 211, 222, 239, 251, 266, 278, 290, 303, 317, 327, 342, 357, 367, 378, 393, 407, 419, 430, 442, 452, 463, 478, 489, 503, 516, 528, 539, 550, 565, 574, 590, 599, 610, 622, 634, 646, 654, 669, 681, 692, 702

Offset

1,1

References

Fred W. Helenius (fredh(AT)ix.netcom.com), posting to newsgroup rec.puzzles, Dec. 1997.

Links

Robert G. Wilson v, Table of n, a(n) for n = 1..10000

J. Betrema, Table et repartition des nombres premiers inferieurs a 10000

A. Booker, The Nth Prime Page

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)

Mathematica

Table[ PrimePi[ n*100 ], {n, 55}] (* Robert G. Wilson v, Jan 29 2003 *)

Prog

(Macsyma) for n:1 through 50 do print(prime_pi(100*n));
(PARI) a(n)=primepi(100*n) \\ Charles R Greathouse IV, Apr 28 2015

Crossrefs

Cf. A000720, A038801, A038812, A038813, A038814, A038815, A038816, A038817, A038818, A038819, A038820, A038821, A080122, A080123, A080124, A080125, A080126, A080127, A080128, A080129.

Sequence in context: A339958 A192261 A038811 * A367496 A154082 A216869

Adjacent sequences: A028502 A028503 A028504 * A028506 A028507 A028508

Keyword

nonn

Author

Chris Cole (chris(AT)questrel.com)

Status

approved