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
Examples
See Illustration in Links section.
Links
- Rémy Sigrist, Illustration of initial terms
- Rémy Sigrist, C program for A341194
- Index entries for sequences related to 3x+1 (or Collatz) problem
Programs
-
C
See Links section.
Formula
a(n) <= 2^n.
a(n+1) <= 2*a(n).