A121507 - OEIS

A121507

Conjectured list of numbers whose aliquot sequence eventually reaches a cycle of length two or more.

220, 284, 562, 1064, 1184, 1188, 1210, 1308, 1336, 1380, 1420, 1490, 1604, 1690, 1692, 1772, 1816, 1898, 2008, 2122, 2152, 2172, 2362, 2542, 2620, 2630, 2652, 2676, 2678, 2856, 2924, 2930, 2950, 2974, 3124, 3162, 3202, 3278, 3286, 3332, 3350, 3360

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

OFFSET

1,1

COMMENTS

For some numbers the outcome of the aliquot sequence is unknown. Currently, 276 is the least such.

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Cf. A008892, A063769, A063990, A072890, A072891, A098007, A121508.

Sequence in context: A217160 A203777 A274116 * A255215 A063990 A259180

Adjacent sequences: A121504 A121505 A121506 * A121508 A121509 A121510

KEYWORD

nonn

AUTHOR

Joshua Zucker, Aug 04 2006

EXTENSIONS

Edited by Don Reble, Aug 15 2006

STATUS

approved