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.

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