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 A086692 Number of primes < 3^prime(n). 0
 4, 9, 53, 327, 16097, 120739, 7332159, 58648288, 3886548158, 2226457080707, 18703411700669, 11364488265762429, 828569015819923142, 7102411822168379213, 525323427853694627277 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS FORMULA a(n) = A055729(prime(n)). - R. J. Mathar, Sep 15 2012 EXAMPLE There are 4 primes < 3^2 MATHEMATICA Table[PrimePi[3^Prime[n]], {n, 9}] (* Michael De Vlieger, Mar 20 2015 *) PROG (PARI) primesless3p(n) = /* primes less than 3^p */ { forprime(x=2, n, y=primepi(3^x); print1(y", "); ); print()} CROSSREFS Cf. A055729. Sequence in context: A030694 A060998 A009276 * A242036 A069507 A219894 Adjacent sequences:  A086689 A086690 A086691 * A086693 A086694 A086695 KEYWORD easy,nonn AUTHOR Cino Hilliard, Jul 28 2003 EXTENSIONS a(10)-a(16) added by David Baugh, Mar 17 2015 STATUS approved

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Last modified January 21 11:44 EST 2019. Contains 319354 sequences. (Running on oeis4.)