A384482 Number of functions f(x) = b*x+c with nonnegative integer coefficients and a shortest addition-composition chain of length n, starting with 1 and x.

2, 3, 7, 20, 75, 412, 3200, 34167, 507344

Offset

0,1

Comments

See A384480 for details.

Links

Table of n, a(n) for n=0..8.

Crossrefs

Cf. A383331 (addition only), A384382 (addition and multiplication), A384383 (addition, multiplication, and composition), A384480, A384481, A384485.

Sequence in context: A222776 A222890 A011968 * A080021 A306666 A032313

Adjacent sequences: A384479 A384480 A384481 * A384483 A384484 A384485

Keyword

nonn,more

Author

Pontus von Brömssen, Jun 02 2025

Status

approved