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A050172 a(n) = n-th number k such that b(k) < b(k+1), where b = A050170. 2
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 (list; graph; refs; listen; history; text; internal format)
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-Fran├žois Alcover, Sep 12 2017 *)

CROSSREFS

Sequence in context: A284934 A320928 A186225 * A191877 A277124 A094820

Adjacent sequences:  A050169 A050170 A050171 * A050173 A050174 A050175

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 19 22:36 EST 2020. Contains 332061 sequences. (Running on oeis4.)