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

Offset: 1

Author

Joshua Zucker, Aug 04 2006

Keywords

• nonn

Comments

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

Crossrefs

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

Extensions

Edited by Don Reble, Aug 15 2006