This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A325533 #6 May 07 2019 19:19:16
%S A325533 3,1,2,3,3,4,2,3,1,2,3,1,2,2,4,3,1,2,3,3,3,1,2,3,3,3,1,2,2,2,2,3,1,2,
%T A325533 3,3,4,2,3,1,2,3,1,2,3,3,3,1,2,3,1,2,4,2,3,3,3,1,2,2,4,3,1,2,3,3,4,2,
%U A325533 3,1,2,3,1,2,2,4,3,1,2,3,3,4,2,3,3,3
%N A325533 Difference sequence of A325443.
%C A325533 See A325417 for a guide to related sequences. Conjecture: every term is in {1,2,3,4}.
%H A325533 Clark Kimberling, <a href="/A325533/b325533.txt">Table of n, a(n) for n = 1..10000</a>
%t A325533 a = {1}; Do[AppendTo[a, NestWhile[# + 1 &, Last[a] + 1, Apply[Or,
%t A325533 Map[MemberQ[a, #] &, Select[Flatten[{(#+1)/2, #/3}],
%t A325533 IntegerQ]]] &]], {20000}]; a; (* A315442 *)
%t A325533 c = Complement[Range[Last[a]], a] ; (* A325443 *)
%t A325533 Differences[a] (* A325532 *)
%t A325533 Differences[c] (* A325533 *)
%t A325533 (* _Peter J. C. Moses_, Apr 23 2019 *)
%Y A325533 Cf. A325417, A325443, A325532.
%K A325533 nonn,easy
%O A325533 1,1
%A A325533 _Clark Kimberling_, May 07 2019