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A072892 The 4-cycle of the n => sigma(n)-n process. sigma(n) is the sum of divisors of n. (A000203) a(4+n)=a(n). 0
1264460, 1547860, 1727636, 1305184, 1264460 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

CROSSREFS

Cf. A000203, A045477.

Sequence in context: A233465 A250596 A250825 * A090615 A222975 A180624

Adjacent sequences:  A072889 A072890 A072891 * A072893 A072894 A072895

KEYWORD

fini,full,nonn

AUTHOR

Miklos Kristof, Jul 29 2002

STATUS

approved

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Last modified July 22 10:33 EDT 2017. Contains 289669 sequences.