A143930 Aliquot sequence starting at 3630.

3630, 5946, 5958, 6990, 9858, 10878, 15114, 18006, 18018, 34398, 61362, 90894, 90906, 93894, 93906, 124974, 153018, 178560, 457920, 1188000, 3529440, 9776160, 26028000, 69107040, 187267680, 478980000, 1268710560, 4065625440, 10164078720, 25833761280

Offset: 0

Author

N. J. A. Sloane, Nov 30 2008

Keywords

• nonn
• fini
• full
• look

Links

• T. D. Noe, Table of n, a(n) for n = 0..2624 [complete sequence from Varona data file "SQ3630-to-1"]
• Manuel Benito, Wolfgang Creyaufmüller, Juan L. Varona, and Paul Zimmermann, Aliquot Sequence 3630 Ends After Reaching 100 Digits, Experimental Mathematics, Vol. 11, No. 2, 2002, pp. 201-206.
• Juan L. Varona, Aliquot Sequences

Crossrefs

Cf. A001065.

Programs

Mathematica

NestList[DivisorSigma[1,#]-#&,3630,50] (* Paolo Xausa, Oct 16 2023 *)

Formula

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