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A082879 Number of primes not exceeding factorial of n-th prime. 0
1, 3, 30, 675, 2428956, 289620751, 10953617995740, 3175094503778521 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..8.

Tomás Oliveira e Silva, Tables of values of pi(x) and of pi2(x) [From Donovan Johnson, Feb 18 2010]

FORMULA

a(n)=A000720[A000142[A000040(n)]]

MATHEMATICA

Table[PrimePi[Prime[j]! ], {j, 1, 6}]

CROSSREFS

Cf. A000720, A000142, A000040.

Sequence in context: A007019 A327021 A186941 * A012007 A065753 A255926

Adjacent sequences:  A082876 A082877 A082878 * A082880 A082881 A082882

KEYWORD

easy,nonn

AUTHOR

Labos Elemer, Apr 16 2003

EXTENSIONS

a(7) from Donovan Johnson, Dec 15 2009

a(8) from Donovan Johnson, Feb 18 2010

STATUS

approved

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Last modified April 1 14:52 EDT 2020. Contains 333163 sequences. (Running on oeis4.)