A382711 Regarding A381019 as a permutation of the natural numbers, this is the cycle with smallest term 8, read in the forward direction.

8, 13, 9, 17, 41, 139, 677, 4651, 43037

Offset: 1

Author

N. J. A. Sloane, Apr 06 2025

Keywords

• nonn
• more

Comments

A382712 shows the cycle containing 8 but read in the opposite direction. If this cycle turns out to be finite, both the present sequence and A382712 will be periodic, but if the cycle is infinite, the two sequences will never meet again.

A311019 has five finite cycles involving the numbers less than 8: (1), (2), (3), (4,5,7), and (6,11,23).

Crossrefs

Cf. A381019, A382712.