A014360 Aliquot sequence starting at 552.

552, 888, 1392, 2328, 3552, 6024, 9096, 13704, 20616, 30984, 46536, 86904, 165816, 367704, 628356, 837836, 628384, 630356, 491884, 368920, 499400, 772840, 978650, 975652, 744248, 696712, 628628, 857836, 857892, 1472268

Offset

0,1

References

R. K. Guy, Unsolved Problems in Number Theory, B6.

Links

Tyler Busby, Table of n, a(n) for n = 0..1142 (terms 0..352 from T. D. Noe)

Christophe Clavier, Aliquot Sequences

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]&, 552, 100] (* Jean-François Alcover, Mar 28 2020 *)

Prog

(PARI) a(n, a=552)={for(i=1, n, a=sigma(a)-a); a} \\ M. F. Hasler, Feb 24 2018

Crossrefs

Cf. A001065, A098007 (length of aliquot sequences).

Some other examples: A008885 (starting at 30) .. A008892 (starting at 276), A014361 (starting at 564) .. A014365 (starting at 1134), see link to index for a more complete list.

Sequence in context: A263947 A203629 A119897 * A158636 A251161 A189549

Adjacent sequences: A014357 A014358 A014359 * A014361 A014362 A014363

Keyword

nonn

Author

Paul Zimmermann

Status

approved