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 A325599 Difference sequence of A325597. 5
 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS All the terms of A325599 are in {1,2}, so that A325600 and A325601 are a complementary pair. LINKS Clark Kimberling, Table of n, a(n) for n = 1..10000 MATHEMATICA mex[list_, start_] := (NestWhile[# + 1 &, start, MemberQ[list, #] &]); a = {1}; Do[AppendTo[a, mex[Rest[2 a] + Most[a], Last[a] + 1]], {60}]; a (* A325597 *) c = Complement[Range[Last[a]], a] (* A325598 *) da = Differences[a] (* A325599 *) Flatten[Position[da, 1]] (* A325600 *) Flatten[Position[da, 2]] (* A325601) *) (* Peter J. C. Moses, May 07 2019 *) CROSSREFS Cf. A325597. Sequence in context: A057557 A353364 A328390 * A023520 A103587 A306446 Adjacent sequences: A325596 A325597 A325598 * A325600 A325601 A325602 KEYWORD nonn,easy AUTHOR Clark Kimberling, May 11 2019 STATUS approved

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Last modified January 30 03:32 EST 2023. Contains 359939 sequences. (Running on oeis4.)