A088835 a(n) = lcm(A020639(n), A006530(n)).

1, 2, 3, 2, 5, 6, 7, 2, 3, 10, 11, 6, 13, 14, 15, 2, 17, 6, 19, 10, 21, 22, 23, 6, 5, 26, 3, 14, 29, 10, 31, 2, 33, 34, 35, 6, 37, 38, 39, 10, 41, 14, 43, 22, 15, 46, 47, 6, 7, 10, 51, 26, 53, 6, 55, 14, 57, 58, 59, 10, 61, 62, 21, 2, 65, 22, 67, 34, 69, 14, 71, 6, 73, 74, 15, 38, 77

Offset

1,2

Links

Enrique Pérez Herrero, Table of n, a(n) for n = 1..10000

Mathematica

Map[LCM[#[[1, 1]], #[[-1, 1]]] &, FactorInteger[Range[100]]] (* Paolo Xausa, Mar 29 2024 *)

Prog

(PARI) a(n) = if (n==1, 1, my(f=factor(n)[, 1]~); lcm(vecmin(f), vecmax(f))); \\ Michel Marcus, Mar 15 2018

Crossrefs

Cf. A020639, A006530, A066048, A007947, A062953, A015052, A015053, A053166.

Sequence in context: A281495 A056554 A346486 * A007947 A015053 A062953

Adjacent sequences: A088832 A088833 A088834 * A088836 A088837 A088838

Keyword

nonn

Author

Labos Elemer, Oct 31 2003

Status

approved