A014362 Aliquot sequence starting at 660.

660, 1356, 1836, 3204, 4986, 5856, 9768, 17592, 26448, 47952, 94586, 47296, 46684, 42524, 31900, 46220, 50884, 38170, 36998, 22810, 18266, 9136, 8596, 8652, 14644, 14700, 34776, 80424, 137586, 149838, 194898, 230478, 236082

Offset: 0

Author

Paul Zimmermann

Keywords

• nonn

References

• Richard K. Guy, Unsolved Problems in Number Theory, 3rd Edition, Springer, 2004, Section B6, pp. 92-95.

Links

• Tyler Busby, Table of n, a(n) for n = 0..1074 (from factordb.com; terms 0..268 from T. D. Noe, terms 269..1008 from Amiram Eldar)
• Christophe Clavier, Aliquot Sequences.
• factordb.com, Aliquot sequence of 660.
• Paul Zimmermann, Latest information.
• Index entries for sequences related to aliquot parts.

Crossrefs

Cf. A001065, A014361, A014363.

Programs

Mathematica

FixedPointList[If[# > 0, DivisorSigma[1, #] - #, 0]&, 660, 100] (* Jean-François Alcover, Mar 28 2020 *)

Formula

a(n+1) = A001065(a(n)). - R. J. Mathar, Oct 11 2017