A375013 A cycle of length 6 when iterating x <- phi(sigma(x)).

1800, 2880, 3024, 3840, 3456, 2560

Offset

1,1

Comments

The first term in the sequence is the smallest member of the cycle. This is the 6-cycle with the smallest members. Similar cycles are in the crossreferences.

Links

Table of n, a(n) for n=1..6.

Example

phi(sigma(1800)) = 2880, ... phi(sigma(2560)) = 1800, so 1800 is in the sequence.

Crossrefs

Cf. A095955, A095956, A001229, A373435, A373453, A373454, A375012, A375014.

Sequence in context: A035891 A069476 A179695 * A380847 A025139 A035767

Adjacent sequences: A375010 A375011 A375012 * A375014 A375015 A375016

Keyword

nonn,fini,full

Author

Jud McCranie, Jul 27 2024

Status

approved