OFFSET
1,2
COMMENTS
See A191203.
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
EXAMPLE
1 -> 3 -> 4,9 -> 6,12,13,27 ->
MATHEMATICA
g=15; Union[Flatten[NestList[{Floor[3#/2], 3#} &, 1, g]]]
(* A191287; use g>14 to get all of first 60 terms *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 29 2011
STATUS
approved