cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A134790 Floor(prime Fibonacci(Prime(k))/Prime(k)).

Original entry on oeis.org

0, 1, 1, 8, 17, 93, 1245, 17732, 10081265, 63217341, 1195118711985005, 8140003186959622868813528, 139669360584622467747806013, 1324290912910022899017738237233285189213652972190967113265372469016533360
Offset: 1

Views

Author

Artur Jasinski, Nov 12 2007

Keywords

Examples

			17732 is in the sequence because floor(514229/29) = 17732, where 29 is the 10th prime number and 514229 = Fibonacci(29) is also a prime. - _Bruno Berselli_, Jul 10 2012

Links

Crossrefs

Cf. A050937, A090819, A134787, A134788, A134789.
Cf. A000040, A000045, A075737.

Programs

  • Mathematica
    k = {}; Do[If[PrimeQ[Fibonacci[Prime[n]]], AppendTo[k, Floor[Fibonacci[Prime[n]]/Prime[n]]]], {n, 1, 100}]; k

A134791 a(n) = floor(log(Fibonacci(prime(k))/prime(k))), where k = A119984(n).

Original entry on oeis.org

-1, 0, 0, 2, 2, 4, 7, 9, 16, 17, 34, 57, 60, 166, 200, 201, 209, 237, 266, 267, 1420, 2263, 2582, 4470, 4646, 6933, 12289, 14789, 17311, 18039, 24449, 39369, 50472, 62555, 71250, 96762, 191209, 208726, 283920, 285676, 290979, 448242, 505208, 618634, 787250, 867638
Offset: 1

Views

Author

Artur Jasinski, Nov 12 2007

Keywords

Links

Crossrefs

Cf. A000045, A050937, A090819, A119984, A134787, A134788, A134789, A134790, A134792.

Programs

  • Mathematica
    k = {}; Do[If[PrimeQ[Fibonacci[Prime[n]]], AppendTo[k, Floor[Log[Fibonacci[Prime[n]]/Prime[n]]]]], {n, 1, 200}]; k

Extensions

a(21)-a(46) from Amiram Eldar, Oct 13 2024

A134792 a(n) = round(log(Fibonacci(prime(k))/prime(k))), where k = A119984(n).

Original entry on oeis.org

0, 0, 1, 2, 3, 5, 7, 10, 16, 18, 35, 57, 60, 166, 201, 201, 209, 238, 267, 268, 1421, 2263, 2583, 4471, 4647, 6934, 12289, 14789, 17312, 18039, 24450, 39370, 50472, 62555, 71250, 96762, 191210, 208727, 283921, 285676, 290980, 448242, 505208, 618634, 787251, 867638
Offset: 1

Views

Author

Artur Jasinski, Nov 12 2007

Keywords

Links

Crossrefs

Cf. A000045, A050937, A090819, A119984, A134787, A134788, A134789, A134790, A134791.

Programs

  • Mathematica
    k = {}; Do[If[PrimeQ[Fibonacci[Prime[n]]], AppendTo[k, Round[Log[Fibonacci[Prime[n]]/Prime[n]]]]], {n, 1, 200}]; k

Extensions

a(21)-a(46) from Amiram Eldar, Oct 13 2024

A135724 Fibonacci numbers whose indices are prime Fibonacci numbers: a(n) = Fibonacci(A001605(n)).

Original entry on oeis.org

1, 2, 5, 233, 1779979416004714189, 2211236406303914545699412969744873993387956988653
Offset: 1

Views

Author

Artur Jasinski, Nov 26 2007

Keywords

Comments

The only known prime numbers in this sequence are 2, 5 and 233.
The next term (a(6)) has 334 digits. - Harvey P. Dale, Apr 28 2023

Links

Crossrefs

Cf. A000045, A001605, A135723, A134787, A134788, A134789, A134790.

Programs

  • Mathematica
    a = {}; b = {}; Do[If[PrimeQ[c = Fibonacci[n]], w = Fibonacci[Fibonacci[n]]; AppendTo[a, w]; AppendTo[b, n]], {n, 1, 31}]; a
Fibonacci[#]&/@Select[Fibonacci[Range[20]],PrimeQ] (* Harvey P. Dale, Apr 28 2023 *)

Extensions

Corrected by Harvey P. Dale, Apr 28 2023
Showing 1-4 of 4 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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