login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A129896 a(1)=1. a(n) = a(n-1) + number of Fibonacci numbers among the first (n-1) terms of the sequence. 1
1, 2, 4, 6, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 149, 153, 157, 161, 165, 169, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The Fibonacci numbers in this sequence are: 1, 2, 8, 89, 233, 46368, 14930352, ..., . (A131349) - Robert G. Wilson v, Jul 02 2007

LINKS

Table of n, a(n) for n=1..62.

MATHEMATICA

fibQ[n_] := (Fibonacci@ Round@ Log[ GoldenRatio, n*Sqrt@5] == n); f[lst_] := Append[lst, Last@lst + Length@Select[lst, fibQ@# &]]; Nest[f, {1}, 38] - Robert G. Wilson v, Jul 02 2007

nxt[{fibs_, a_}]:=Module[{f=Fibonacci[Range[50]], x=fibs}, If[MemberQ[f, a], x++]; {x, a+x}]; NestList[nxt, {0, 1}, 70][[All, 2]] (* Harvey P. Dale, Sep 16 2020 *)

CROSSREFS

Sequence in context: A331417 A077473 A200738 * A134421 A092777 A186380

Adjacent sequences:  A129893 A129894 A129895 * A129897 A129898 A129899

KEYWORD

nonn

AUTHOR

Leroy Quet, Jun 04 2007

EXTENSIONS

More terms from Robert G. Wilson v, Jul 02 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 23 04:15 EDT 2021. Contains 347609 sequences. (Running on oeis4.)