Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
1,1
Why isn't 42 in this list? It does not enter a cycle in under 100 iterations which is as far as I could check. [Sean A. Irvine, Oct 05 2011]
Table of n, a(n) for n=1..6.
Cf. A002487, A070871, A071884, A071885, A071886.
Sequence in context: A190839 A185698 A043611 * A168143 A111043 A041683
Adjacent sequences: A071884 A071885 A071886 * A071888 A071889 A071890
nonn,more
J. H. Conway, Jun 10 2002
approved