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.
%I A029451 #15 Jul 04 2021 02:00:03
%S A029451 1,2,3,5,6,9,10,12,15,18,20,22,25,30,36,40,45,50,54,60,68,72,75,90,
%T A029451 100,103,108,116,120,132,135,150,180,200,216,225,226,240,252,270,274,
%U A029451 280,285,300,308,315,324,336,350,360,378,400,405,420,432,450,456,504
%N A029451 Numbers k that divide the (right) concatenation of all numbers <= k written in base 6 (most significant digit on left).
%H A029451 Robert Price, <a href="/A029451/b029451.txt">Table of n, a(n) for n = 1..251</a>
%t A029451 b = 6; c = {}; Select[Range[10^5], Divisible[FromDigits[c = Join[c, IntegerDigits[#, b]], b], #] &] (* _Robert Price_, Mar 11 2020 *)
%Y A029451 Cf. A007092.
%Y A029451 Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
%K A029451 nonn,base
%O A029451 1,2
%A A029451 _Olivier Gérard_