A325530 - OEIS

%I #8 May 07 2019 21:29:45

%S 2,1,2,3,1,2,1,1,1,1,2,2,1,1,2,4,2,2,1,1,2,1,3,2,3,1,2,1,1,1,1,2,2,1,

%T 1,2,1,3,2,2,1,1,2,2,1,1,1,1,2,1,1,2,1,1,1,1,2,2,1,1,2,4,2,2,1,1,2,1,

%U 3,2,2,1,1,2,2,1,1,2,2,1,1,2,1,3,2,2

%N Difference sequence of A325440.

%C See A325417 for a guide to related sequences. Conjecture: every term is in {1,2,3,4}.

%H Clark Kimberling, <a href="/A325530/b325530.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, (#+1)/3}],

%t IntegerQ]]] &]], {20000}]; a;         (* A315440 *)

%t c = Complement[Range[Last[a]], a] ;   (* A325441 *)

%t Differences[a]  (* A325530 *)

%t Differences[c]  (* A325531 *)

%t (* _Peter J. C. Moses_, Apr 23 2019 *)

%Y Cf. A325417, A325440, A325531.

%K nonn,easy

%O 1,1

%A _Clark Kimberling_, May 07 2019