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.

A178784 Let d be the vector of divisors of 100 sorted from largest to smallest, i.e., [100,50,25,20,10,5,4,2,1]. Then a(n) = 100/d(n) - 1.

Original entry on oeis.org

0, 1, 3, 4, 9, 19, 24, 49, 99
Offset: 1

Views

Author

Ross La Haye, Jun 13 2010

Keywords

Crossrefs

Cf. A018283.

Programs

  • Mathematica
    Map[(100/# - 1)&, Sort[Divisors[100], Greater]]
    Map[(#-1)&,Divisors[100]]  (* Ross La Haye, Jun 17 2010 *)
    100/Reverse[Divisors[100]]-1 (* Harvey P. Dale, Jan 14 2015 *)

Formula

a(n) = 100/A018283(10-n) - 1.
a(n) = A018283(n) - 1. - Ross La Haye, Jun 17 2010