OFFSET
1,1
COMMENTS
These are the numbers 2x+1 and floor(3x/2) as x ranges through the numbers x>1 in A325427.
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[{(#-1)/2,
If[Mod[#, 3] == 0, (2 #)/3, 0] + If[Mod[#, 3] == 1, 1/3 (1 + 2 #), 0]}],
IntegerQ || # == 0]]] &]], {150}]; a (* A325427 *)
Complement[Range[Last[a]], a] (* A325428 *)
(* Peter J. C. Moses, Apr 25 2019 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 30 2019
STATUS
approved