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.

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A178356 Fibonacci numbers whose successive digits decrease by 1.

Original entry on oeis.org

0, 1, 2, 3, 5, 8, 21, 987
Offset: 1

Views

Author

Felix Tubiana, May 25 2010

Keywords

Comments

Only need to consider the Fibonacci numbers less than 9876543210.

Crossrefs

Programs

  • Mathematica
    Join[{0,1,2,3,5,8},Select[Fibonacci[Range[250]],Union[Differences[ IntegerDigits[#]]]=={-1}&]] (* Harvey P. Dale, Sep 14 2011 *)
  • PARI
    n=0;while((f=fibonacci(n))<=9876543210,if(is(f),print1(f", "));n++) \\ Charles R Greathouse IV, Sep 14 2011

Formula

{ A000045 } intersect { A138142 }. - Alois P. Heinz, Jul 05 2022

Extensions

Definition clarified by Harvey P. Dale, Sep 14 2011
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