OFFSET
1,1
REFERENCES
These are the numbers 2x and 3x+1 as x ranges through the numbers in A325417.
LINKS
Clark Kimberling, Table of n, a(n) for n = 1..10000
MATHEMATICA
a = {1}; Do[AppendTo[a, NestWhile[# + 1 &, Last[a] + 1,
Apply[Or, Map[MemberQ[a, #] &, Select[Flatten[{#/2, (# - 1)/3}],
IntegerQ]]] &]], {150}]; a (* A325417 *)
Complement[Range[Last[a]], a] (* A325418 *)
(* Peter J. C. Moses, Apr 23 2019 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 24 2019
STATUS
approved