A050172 Numbers k such that b(k) < b(k+1), where b = A050170.

1, 2, 3, 5, 6, 8, 9, 11, 13, 14, 16, 18, 21, 22, 24, 25, 27, 30, 31, 33, 34, 36, 39, 40, 42, 45, 46, 48, 49, 51, 54, 55, 57, 59, 62, 63, 65, 68, 71, 72, 74, 75, 77, 79, 82, 83, 85, 86, 88, 91, 92, 94, 96, 99, 101, 104, 106, 107, 109, 110

Offset

1,2

Comments

Complement of A050173.

Links

Ivan Neretin, Table of n, a(n) for n = 1..10000

Mathematica

kmax = 110; (* b = A050170 *) b[1] = 1; b[n_] := b[n] = If[FreeQ[Join[{0}, Array[b, n - 1]], f = Floor[b[n - 1]/Sqrt[5]]], f, Floor[b[n - 1]*Sqrt[5]]]; Reap[For[k = 1, k <= kmax, k++, If[b[k] < b[k + 1], Sow[k]]]][[2, 1]] (* Jean-François Alcover, Sep 12 2017 *)

Crossrefs

Sequence in context: A320928 A186225 A353130 * A191877 A277124 A094820

Adjacent sequences: A050169 A050170 A050171 * A050173 A050174 A050175

Keyword

nonn

Author

Clark Kimberling

Status

approved