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A121507 Conjectured list of numbers whose aliquot sequence eventually reaches a cycle of length two or more. 8
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

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Last modified December 11 15:43 EST 2017. Contains 295905 sequences.