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A028505 Number of primes <= 100*n. 24
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 (list; graph; refs; listen; history; text; internal format)
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

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: A054520 A192261 A038811 * A154082 A216869 A143278

Adjacent sequences:  A028502 A028503 A028504 * A028506 A028507 A028508

KEYWORD

nonn

AUTHOR

Chris Cole (chris(AT)questrel.com)

STATUS

approved

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Last modified November 23 21:51 EST 2020. Contains 338603 sequences. (Running on oeis4.)