OFFSET
0,2
COMMENTS
If the starting value is even then of course the next step in the trajectory is smaller.
EXAMPLE
9 -> 27 -> 140 -> 11 -> 36 -> 6, taking 5 steps, so a(4) = 5.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Jun 10 2004
STATUS
approved