A383002 Number of integers with a shortest addition-multiplication chain of length n.

1, 1, 2, 5, 16, 63, 331, 2239, 19909, 225615, 3167570

Offset

0,3

Comments

a(n) is the number of occurrences of n in A230697.

Links

Table of n, a(n) for n=0..10.

Crossrefs

Cf. A003065, A230697, A383001.

Sequence in context: A059685 A000112 A205498 * A379082 A295131 A178119

Adjacent sequences: A382999 A383000 A383001 * A383003 A383004 A383005

Keyword

nonn,hard,more

Author

Pontus von Brömssen, Apr 12 2025

Status

approved