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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
OFFSET
1,1
REFERENCES
Fred W. Helenius (fredh(AT)ix.netcom.com), posting to newsgroup rec.puzzles, Dec. 1997.
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
KEYWORD
nonn
AUTHOR
Chris Cole (chris(AT)questrel.com)
STATUS
approved