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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A029535 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 18 (most significant digit on right and removing all least significant zeros before concatenation).

Original entry on oeis.org

1, 17, 323, 8429, 49127, 98753, 185509, 4300535, 8296187
Offset: 1

Views

Author

Olivier Gérard

Keywords

Comments

This sequence differs from A061971 in that all least significant zeros are removed before concatenation.
No more terms < 10^7. [Lars Blomberg, Sep 22 2011]

Examples

			See A029519 for example.

Links

Crossrefs

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

Programs

  • Mathematica
    b = 18; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[IntegerReverse[#, b], b], c], b], #] &] (* Robert Price, Mar 13 2020 *)

Extensions

Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
Additional comments from Larry Reeves (larryr(AT)acm.org), Jun 01 2001
a(5)-a(7) from Larry Reeves Jul 16 2001
a(8)-a(9) from Lars Blomberg, Sep 22 2011
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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