A384386 Number of integers with a shortest addition-multiplication-composition chain of length n, starting with 1 and x, i.e., number of integers k with A384384(k) = n.

1, 1, 2, 5, 16, 82, 907

Offset

0,3

Comments

See A384383 and A384384 for details.

Links

Table of n, a(n) for n=0..6.

Crossrefs

Cf. A383002 (addition and multiplication), A384383, A384384, A384385, A384485 (addition and composition).

Sequence in context: A048754 A176343 A327062 * A334157 A395011 A306020

Adjacent sequences: A384383 A384384 A384385 * A384387 A384388 A384389

Keyword

nonn,more

Author

Pontus von Brömssen, Jun 01 2025

Status

approved