A057334 In A000120, replace each entry k with the k-th prime and replace 0 with 1.

1, 2, 2, 3, 2, 3, 3, 5, 2, 3, 3, 5, 3, 5, 5, 7, 2, 3, 3, 5, 3, 5, 5, 7, 3, 5, 5, 7, 5, 7, 7, 11, 2, 3, 3, 5, 3, 5, 5, 7, 3, 5, 5, 7, 5, 7, 7, 11, 3, 5, 5, 7, 5, 7, 7, 11, 5, 7, 7, 11, 7, 11, 11, 13, 2, 3, 3, 5, 3, 5, 5, 7, 3, 5, 5, 7, 5, 7, 7, 11, 3, 5, 5, 7

Offset

0,2

Links

Table of n, a(n) for n=0..83.

Michael Gilleland, Some Self-Similar Integer Sequences

Formula

a(n) = A000040(A000120(n)) for n>0.

Prog

(PARI) a(n) = if (n==0, 1, prime(hammingweight(n))); \\ Michel Marcus, Feb 08 2014

Crossrefs

Cf. A000040, A000120, A055932, A057335.

Sequence in context: A239500 A029204 A241085 * A048475 A204597 A285734

Adjacent sequences: A057331 A057332 A057333 * A057335 A057336 A057337

Keyword

easy,nonn

Author

Alford Arnold, Aug 27 2000

Extensions

More terms from Michel Marcus, Feb 08 2014

Status

approved