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

0,1

References

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

Links

Amiram Eldar, Table of n, a(n) for n = 0..1008 (from factordb.com; terms 0..268 from T. D. Noe)

Christophe Clavier, Aliquot Sequences.

factordb.com, Aliquot sequence of 660.

Paul Zimmermann, Latest information.

Index entries for sequences related to aliquot parts.

Formula

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

Mathematica

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

Crossrefs

Cf. A001065, A014361, A014363.

Sequence in context: A113171 A364004 A252519 * A143042 A206642 A064261

Adjacent sequences: A014359 A014360 A014361 * A014363 A014364 A014365

Keyword

nonn

Author

Paul Zimmermann

Status

approved