A092252 a(n) = prime(prime(10^n)).

3, 109, 3911, 80917, 1366661, 20491057, 285058399, 3767321791, 47991893393, 594421377761, 7201814452873, 85713609222697, 1005238339412819, 11644468481142713, 133472665317708923, 1516047373452105311

Offset: 0

Author

Cino Hilliard, Feb 19 2004

Keywords

• nonn
• more

Links

• Kim Walisch, Fast C++ prime counting function implementation (primecount).

Crossrefs

Cf. A000040, A006450, A006988, A096359.

Programs

Mathematica

Table[Prime[Prime[10^n]], {n, 0, 10}] (* Amiram Eldar, Jun 29 2024 *)

PARI

a(n) = prime(prime(10^n)); \\ Amiram Eldar, Jun 29 2024

Formula

a(n) = A006450(10^n) = A000040(A006988(n)). - Amiram Eldar, Jun 29 2024

Extensions

a(9)-a(10) from Dennis Kluk, Nov 27 2005

a(11)-a(15) using Kim Walisch's primecount added by Amiram Eldar, Jun 29 2024