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

1800, 2880, 3024, 3840, 3456, 2560

Offset: 1

Author

Jud McCranie, Jul 27 2024

Keywords

• nonn
• fini
• full

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.

Examples

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

Crossrefs

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