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A226663 Conjectured record-breaking numbers, for ascending positive integers k, of primitive cycles of positive integers under iteration by the Collatz-like 3x+k function. 3
1, 5, 9, 19, 20, 23, 52, 53, 97, 142, 534, 944, 950, 3806, 4782 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
A cycle is called primitive if its elements are not a common multiple of the elements of another cycle.
The 3x+k function T_k is defined by T_k(x) = x/2 if x is even, (3x+k)/2 if x is odd, where k is odd.
For primitive cycles, GCD(k,6)=1.
LINKS
E. G. Belaga and M. Mignotte, Cyclic Structure of Dynamical Systems Associated with 3x+d Extensions of Collatz Problem, Preprint math. 2000/17, Univ. Louis Pasteur, Strasbourg (2000).
E. G. Belaga and M. Mignotte, Walking Cautiously into the Collatz Wilderness: Algorithmically, Number Theoretically, Randomly, Fourth Colloquium on Mathematics and Computer Science, DMTCS proc. AG. (2006), 249-260.
E. G. Belaga and M. Mignotte, The Collatz Problem and Its Generalizations: Experimental Data. Table 1. Primitive Cycles of (3n+d)-mappings, Preprint math. 2006/15, Univ. Louis Pasteur, Strasbourg (2006).
CROSSREFS
k = A226664(n).
Sequence in context: A046590 A372997 A344746 * A023521 A113805 A160722
KEYWORD
nonn
AUTHOR
Geoffrey H. Morley, Jun 15 2013
STATUS
approved

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Last modified July 25 00:10 EDT 2024. Contains 374585 sequences. (Running on oeis4.)