A341194 a(n) is the least k such that A340873(k) = n.

1, 2, 4, 3, 6, 12, 5, 10, 20, 13, 25, 9, 17, 34, 29, 57, 114, 41, 81, 49, 97, 33, 65, 129, 113, 225, 449, 169, 337, 201, 401, 801, 285, 545, 489, 925, 1833, 641, 1281, 769, 1537, 513, 1025, 2049, 1793, 3585, 1473, 2689, 1665, 3201, 6401, 2557, 4381, 3753, 7505

Offset

0,2

Links

Table of n, a(n) for n=0..54.

Rémy Sigrist, Illustration of initial terms

Rémy Sigrist, C program for A341194

Index entries for sequences related to 3x+1 (or Collatz) problem

Formula

a(n) <= 2^n.

a(n+1) <= 2*a(n).

Example

See Illustration in Links section.

Prog

(C) See Links section.

Crossrefs

Cf. A033491, A340873.

Sequence in context: A258046 A334384 A225055 * A120947 A222600 A046793

Adjacent sequences: A341191 A341192 A341193 * A341195 A341196 A341197

Keyword

nonn,base

Author

Rémy Sigrist, Feb 06 2021

Status

approved