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A074906 Aliquot sequence starting at 1521. 2
1521, 858, 1158, 1170, 2106, 2976, 5088, 8520, 17400, 38400, 88452, 196924, 228004, 255836, 255892, 339948, 708372, 1392748, 1392804, 2631580, 3684548, 3684604, 4502876, 4502932, 4630444, 5343604, 5343660, 13185396, 26489484 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

This aliquot sequence starts with the least odd number such that the sequence does not repeat a term after 20 or fewer terms.

REFERENCES

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

LINKS

T. D. Noe, Table of n, a(n) for n = 0..169

Christophe CLAVIER, Aliquot Sequences

FORMULA

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

EXAMPLE

a(0)= 1521, a(1) = sigma(1521) - 1521 = 858

CROSSREFS

Cf. A008888, A008889.

Sequence in context: A203386 A157375 A174746 * A307745 A025413 A025410

Adjacent sequences:  A074903 A074904 A074905 * A074907 A074908 A074909

KEYWORD

nonn,fini,full

AUTHOR

Robert A. Stump (bee_ess107(AT)msn.com), Sep 30 2002

STATUS

approved

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Last modified November 13 12:45 EST 2019. Contains 329094 sequences. (Running on oeis4.)