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.

A029534 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 17 (most significant digit on right and removing all least significant zeros before concatenation).

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%I A029534 #21 Jan 13 2025 13:23:18
%S A029534 1,32,175,1216,1248,1568,2400,4384,18555,39328,68704,560159
%N A029534 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 17 (most significant digit on right and removing all least significant zeros before concatenation).
%C A029534 This sequence differs from A061970 in that all least significant zeros are removed before concatenation.
%C A029534 No more terms < 10^7. [_Lars Blomberg_, Sep 20 2011]
%H A029534 <a href="/index/N#concat">Index entries for related sequences</a>
%e A029534 See A029519 for example.
%t A029534 b = 17; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[IntegerReverse[#, b], b], c], b], #] &] (* _Robert Price_, Mar 13 2020 *)
%Y A029534 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029534 nonn,base,more
%O A029534 1,2
%A A029534 _Olivier Gérard_
%E A029534 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002; Aug 25, 2002