0,1
Does this trajectory converge?
Donovan Johnson, Table of n, a(n) for n = 0..80
Cf. A087712, A098282, A077960.
Sequence in context: A062143 A124100 A071952 * A004385 A152257 A061650
Adjacent sequences: A144911 A144912 A144913 * A144915 A144916 A144917
nonn,hard
N. J. A. Sloane (njas(AT)research.att.com), Feb 18 2009