A338449 a(n) is the radical of A338338(n).

1, 2, 2, 6, 3, 3, 5, 10, 10, 2, 7, 14, 14, 6, 15, 30, 10, 2, 11, 22, 22, 6, 21, 42, 14, 6, 3, 33, 55, 110, 10, 26, 13, 39, 6, 6, 2, 17, 34, 34, 38, 19, 57, 15, 30, 70, 42, 21, 51, 85, 170, 10, 46, 23, 69, 6, 66, 22, 77, 35, 105, 15, 6, 26, 78, 39, 3, 5, 65

Offset: 1

Author

Rémy Sigrist, Oct 28 2020

Keywords

• nonn

Examples

			For n = 9:
- A338338(9) = 20 = 2^2 * 5,
- so a(9) = 2 * 5 = 10.
		

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10000
• Rémy Sigrist, PARI program for A338449

Crossrefs

Cf. A007947, A338338.

Programs

PARI

\\ See Links section.

Formula

a(n) = A007947(A338338(n)).