OFFSET
0,1
REFERENCES
R. K. Guy, Unsolved Problems in Number Theory, E16.
LINKS
EXAMPLE
87 is odd, so it's followed by 3 * 87 - 1 = 260.
260 is even, so it's followed by 260/2 = 130.
MATHEMATICA
NestList[If[EvenQ[#], #/2, 3# - 1] &, 87, 100] (* Alonso del Arte, Aug 22 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved