A024709 Least prime divisor of A024702(n).

2, 5, 7, 2, 3, 2, 5, 2, 3, 2, 7, 2, 3, 5, 5, 11, 2, 2, 2, 7, 2, 2, 5, 2, 3, 3, 2, 2, 5, 2, 5, 5, 2, 13, 3, 2, 29, 3, 3, 2, 2, 3, 2, 5, 2, 19, 5, 2, 2, 2, 3, 2, 2, 3, 2, 23, 2, 47, 7, 3, 2, 2, 53, 5, 2, 29, 5, 2, 2, 2, 11, 3, 2, 5, 3, 2, 2, 5, 5, 2, 2, 2, 13, 2, 2, 5, 2, 3, 2, 2, 5, 5, 2, 5, 2, 3, 3, 7, 3, 47, 2, 5, 2, 7, 2, 2

Offset: 4

Author

Clark Kimberling

Keywords

• nonn

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 4..10000

Crossrefs

Cf. A020639, A024702.

Programs

PARI

a(n)=factor(prime(n)^2\24)[1,1] \\ Charles R Greathouse IV, May 30 2013

Formula

a(n) = A020639(A024702(n)). - Michel Marcus, Sep 24 2023