A029835 [ log(n-th prime) ].

0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Programs

Mathematica

Table[Floor[Log[Prime[n]]], {n, 80}] (* Alonso del Arte, Sep 11 2013 *)

PARI

a(n) = floor(log(prime(n))); \\ Michel Marcus, Sep 11 2013