A122412 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A122412

Indices of primes occurring in A031133.

6

1, 2, 3, 8, 15, 23, 29, 46, 188, 216, 326, 367, 738, 1183, 1662, 2224, 2225, 3384, 3385, 4058, 5948, 14356, 30802, 31544, 33608, 104070, 118504, 325851, 597310, 1319944, 2324139, 4140008, 4258994, 5911613, 8040877, 17567976, 23163297, 25203779

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Jon E. Schoenfield, Table of n, a(n) for n = 1..52

FORMULA

a(n) = pi(A031133(n)).

EXAMPLE

a(4)=8 because the 4th term of A031133 is the 8th prime number.

CROSSREFS

Cf. A031131, A031132, A031133, A031134, A122413.

Sequence in context: A356879 A293688 A285223 * A365413 A174019 A356371

Adjacent sequences: A122409 A122410 A122411 * A122413 A122414 A122415

KEYWORD

nonn

AUTHOR

Jon E. Schoenfield, Sep 02 2006

STATUS

approved