OFFSET
1,3
LINKS
Geoffrey H. Morley, Table of n, a(n) for n = 1..10000
J. C. Lagarias, The set of rational cycles for the 3x+1 problem, Acta Arith. 56 (1990), 33-53. - See Table 3.1 on page 41.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 19 2005
EXTENSIONS
a(12)[k=35] and a(25)[k=73] corrected and more terms added by Geoffrey H. Morley, Mar 14 2013
STATUS
approved