A137458 Prime(core(n)).

2, 3, 5, 2, 11, 13, 17, 3, 2, 29, 31, 5, 41, 43, 47, 2, 59, 3, 67, 11, 73, 79, 83, 13, 2, 101, 5, 17, 109, 113, 127, 3, 137, 139, 149, 2, 157, 163, 167, 29, 179, 181, 191, 31, 11, 199, 211, 5, 2, 3, 233, 41, 241, 13, 257, 43, 269, 271, 277, 47

Offset

1,1

Comments

Prime(Squarefree part of n).

Links

Table of n, a(n) for n=1..60.

Formula

a(n) = A000040(A007913(n)).

Crossrefs

Cf. A000040, A007913.

Sequence in context: A021429 A262217 A124055 * A079369 A102867 A060383

Adjacent sequences: A137455 A137456 A137457 * A137459 A137460 A137461

Keyword

easy,nonn

Author

Jonathan Vos Post, Apr 19 2008

Status

approved