%I #6 May 07 2019 19:19:52
%S 1,2,1,3,2,1,2,1,2,1,1,2,2,1,3,2,1,3,2,2,1,1,2,1,3,2,1,2,1,2,1,3,2,1,
%T 2,1,2,1,3,2,2,2,2,1,3,2,1,2,1,2,1,1,2,2,1,3,2,1,3,2,1,2,1,2,1,3,2,1,
%U 3,2,1,1,2,2,1,2,1,2,1,3,2,2,1,1,2,1
%N Difference sequence of A325442.
%C See A325417 for a guide to related sequences. Conjecture: every term is in {1,2,3}.
%H Clark Kimberling, <a href="/A325532/b325532.txt">Table of n, a(n) for n = 1..10000</a>
%t a = {1}; Do[AppendTo[a, NestWhile[# + 1 &, Last[a] + 1, Apply[Or,
%t Map[MemberQ[a, #] &, Select[Flatten[{(#+1)/2, #/3}],
%t IntegerQ]]] &]], {20000}]; a; (* A315442 *)
%t c = Complement[Range[Last[a]], a] ; (* A325443 *)
%t Differences[a] (* A325532 *)
%t Differences[c] (* A325533 *)
%t (* _Peter J. C. Moses_, Apr 23 2019 *)
%Y Cf. A325417, A325442, A325533.
%K nonn,easy
%O 1,2
%A _Clark Kimberling_, May 07 2019