OFFSET
1,2
LINKS
T. D. Noe, Table of n, a(n) for n = 1..1000
MATHEMATICA
Collatz[n_] := NestWhileList[If[EvenQ[#], #/2, 3*# + 1] &, n, # > 1 &]; Select[Range[1, 100000, 2], Position[Collatz[#], Max[Collatz[#]]] == {{(Length[Collatz[#]] + 1)/2}} &]
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, Apr 14 2013
STATUS
approved