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 1-1 of 1 results.

A024642 n written in fractional base 7/5.

Original entry on oeis.org

0, 1, 2, 3, 4, 5, 6, 50, 51, 52, 53, 54, 55, 56, 530, 531, 532, 533, 534, 535, 536, 5310, 5311, 5312, 5313, 5314, 5315, 5316, 5360, 5361, 5362, 5363, 5364, 5365, 5366, 53140, 53141, 53142, 53143, 53144, 53145, 53146, 53620, 53621, 53622, 53623, 53624, 53625
Offset: 0

Views

Author

David W. Wilson

Keywords

Comments

To represent a number in base b, if a digit exceeds b-1, subtract b and carry 1. In fractional base a/b, subtract a and carry b.

Links

Crossrefs

Cf. A245352.

Programs

  • Mathematica
    a[n_] := a[n] = If[n == 0, 0, 10 * a[5 * Floor[n/7]] + Mod[n, 7]]; Array[a, 50, 0] (* Amiram Eldar, Jul 31 2025 *)
  • PARI
    a(n) = if(n == 0, 0, 10 * a(n\7 * 5) + n % 7); \\ Amiram Eldar, Jul 31 2025
Showing 1-1 of 1 results.

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

Content is available under The OEIS End-User License Agreement.