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A247909 Numbers k such that A247908(k+1) = A247908(k). 3
3, 5, 8, 11, 13, 16, 18, 21, 24, 26, 29, 31, 34, 36, 39, 41, 44, 46, 48, 51, 53, 56, 58, 61, 63, 66, 68, 70, 73, 75, 78, 80, 83, 85, 87, 90, 92, 95, 97, 99, 102, 104, 107, 109, 111, 114, 116, 119, 121, 123, 126, 128, 131, 133, 135, 138, 140, 142, 145, 147 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A247910.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..500

EXAMPLE

A247908(n+1) - A247908(n) = (1,1,0,1,0,1,1,0,1,1,0,1,0,1,1,0,1,...), and a(n) is the position of the n-th 0.

MATHEMATICA

$RecursionLimit = 1000; $MaxExtraPrecision = 1000;

z = 300; u[1] = 0; u[2] = 1; u[n_] := u[n] = u[n - 1] + u[n - 2]/(n - 2);

f[n_] := f[n] = Select[Range[z], E - 2 #/u[2 #] < 1/n^n &, 1];

u = Flatten[Table[f[n], {n, 1, z}]]  (* A247908 *)

w = Differences[u]

Flatten[Position[w, 0]] (* A247909 *)

Flatten[Position[w, 1]] (* A247910 *)

CROSSREFS

Cf. A247908, A247910.

Sequence in context: A288474 A310026 A213732 * A184659 A026274 A137910

Adjacent sequences:  A247906 A247907 A247908 * A247910 A247911 A247912

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Sep 27 2014

STATUS

approved

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Last modified September 21 07:28 EDT 2021. Contains 347596 sequences. (Running on oeis4.)