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

1,2

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program for A338449

Formula

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

Example

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

Prog

(PARI) See Links section.

Crossrefs

Cf. A007947, A338338.

Sequence in context: A130478 A308140 A306464 * A163890 A298983 A128623

Adjacent sequences: A338446 A338447 A338448 * A338450 A338451 A338452

Keyword

nonn

Author

Rémy Sigrist, Oct 28 2020

Status

approved