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A050173 Numbers k such that A050170(k) > A050170(k+1). 2
4, 7, 10, 12, 15, 17, 19, 20, 23, 26, 28, 29, 32, 35, 37, 38, 41, 43, 44, 47, 50, 52, 53, 56, 58, 60, 61, 64, 66, 67, 69, 70, 73, 76, 78, 80, 81, 84, 87, 89, 90, 93, 95, 97, 98, 100, 102, 103, 105, 108, 111, 113, 114, 116, 119, 121, 124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A050172.

LINKS

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

MATHEMATICA

kmax = 124; (* 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

Cf. A050170, A050172.

Sequence in context: A178598 A310675 A176292 * A078633 A190008 A184911

Adjacent sequences:  A050170 A050171 A050172 * A050174 A050175 A050176

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 20 02:19 EDT 2021. Contains 347577 sequences. (Running on oeis4.)