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.
Conjecture: a(n)>0 for all n.
LINKS
Geoffrey H. Morley, Table of n, a(n) for n = 1..2520
CROSSREFS
KEYWORD
nonn
AUTHOR
Geoffrey H. Morley, Jul 05 2013
STATUS
approved