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A214925 Number of primes <= A214757(n) 4
5, 5, 5, 10, 25, 31, 104, 159, 190, 219, 1186, 1832, 2227, 3388, 14358, 30804, 31547, 40935, 103522, 104072, 149690, 325853, 1094426, 1319950, 2850175, 6957880, 10539433, 10655464 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..28.

FORMULA

a(n) = pi(A214757(n)) = A000217(A214757(n)).

EXAMPLE

A214757(4) = 29, so a(4) = primepi(A214757(4)) = primepi(29) = 10.

CROSSREFS

Cf. A000101, A104272, A214756, A001223.

Cf. A002386, A214924, A214926, A214757.

Sequence in context: A299695 A135089 A127310 * A101597 A119991 A262947

Adjacent sequences:  A214922 A214923 A214924 * A214926 A214927 A214928

KEYWORD

nonn

AUTHOR

John W. Nicholson, Aug 06 2012

EXTENSIONS

Extension to a(28) added by John W. Nicholson, Nov 11 2013

STATUS

approved

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Last modified March 4 14:10 EST 2021. Contains 341794 sequences. (Running on oeis4.)