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A214924 Number of primes <= A214756(n). 4
1, 1, 1, 7, 20, 28, 96, 152, 185, 212, 1179, 1829, 2217, 3382, 14350, 30780, 31528, 40929, 103498, 104047, 149674, 325845, 1094396, 1319933, 2850163, 6957867, 10539421, 10655453 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

a(n) = pi(A214756(n)).

LINKS

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

FORMULA

a(n) = A000217(A214756(n))

EXAMPLE

A214756(5) = 71, so a(5) = primepi(A214756(5)) = primepi(71) = 20.

CROSSREFS

Cf. A000101, A104272, A214756, A001223.

Cf. A002386, A214925, A214926, A214757.

Sequence in context: A015243 A055069 A134863 * A333858 A319966 A200773

Adjacent sequences:  A214921 A214922 A214923 * A214925 A214926 A214927

KEYWORD

nonn

AUTHOR

John W. Nicholson, Jul 29 2012

EXTENSIONS

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

STATUS

approved

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Last modified May 18 18:42 EDT 2022. Contains 353824 sequences. (Running on oeis4.)