A325528 - OEIS

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A325528

Difference sequence of A325464.

2, 1, 1, 4, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 3, 1, 2, 4, 2, 1, 1, 2, 2, 3, 1, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 1, 1, 1, 3, 1, 2, 2, 2, 2, 3, 1, 2, 1, 2, 1, 2, 2, 1, 1, 2, 3, 1, 2, 3, 1, 2, 1, 2, 1, 2, 3, 1, 2, 3, 1, 2, 2, 2, 2, 1, 2, 1, 2, 3, 1, 2, 1, 1, 2, 2, 3

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OFFSET

1,1

COMMENTS

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

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, (#+2)/3}],

IntegerQ]]] &]], {20000}]; a; (* A315464 *)

c = Complement[Range[Last[a]], a] ; (* A325465 *)