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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A029504 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 11 (most significant digit on right).

Original entry on oeis.org

1, 5, 15, 24, 40, 69, 72, 75, 120, 167, 216, 280, 360, 536, 1192, 1240, 1360, 11280, 25195, 33216, 33984, 101328, 221640, 400479, 531000, 537640, 600104, 631155, 743085, 958785, 2660431, 2777800
Offset: 1

Views

Author

Olivier Gérard

Keywords

Comments

This sequence differs from A061940 in that all least significant zeros are kept during concatenation.
No more terms < 10^7. - Lars Blomberg, Oct 06 2011

Examples

			See A029495 for example.

Links

Crossrefs

Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.

Programs

  • Mathematica
    b = 11; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* Robert Price, Mar 12 2020 *)

Extensions

Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002; Aug 25, 2002
a(27)-a(32) from Lars Blomberg, Oct 06 2011
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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