A258781 - OEIS

A258781

a(n) is the greatest positive integer k such that lambda(k) <= n where lambda is the Carmichael lambda function (A002322).

2, 24, 24, 240, 240, 504, 504, 504, 504, 504, 504, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 131040, 131040, 131040, 131040, 131040, 131040, 171864, 171864, 171864, 171864, 171864, 171864, 138181680, 138181680, 138181680

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..38.

Eric Weisstein's World of Mathematics, Carmichael Function.

EXAMPLE

a(2)=24 because lambda(24) = 2 and 24 is the greatest number such that lambda(24) <= 2.

CROSSREFS

Cf. A002322, A253215.

Sequence in context: A229429 A281139 A052686 * A371207 A064818 A349724

Adjacent sequences: A258778 A258779 A258780 * A258782 A258783 A258784