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 A032537 #35 Feb 25 2024 05:57:37
%S A032537 0,1,2,7,14,15,21,38,91,132,182,203,210,273,392,420,546,637,924,1365,
%T A032537 1526,1658,1911,1974,2730,3030,3367,4095,5733,6734,7035,10101,20202,
%U A032537 21105,22748,30303,44702,49308,68432,107744,112854,129990,205296
%N A032537 Numbers that, when expressed in base 3 and then interpreted in base 10, yield a multiple of the original number.
%H A032537 Giovanni Resta, <a href="/A032537/b032537.txt">Table of n, a(n) for n = 1..136</a> (terms < 10^12, first 101 terms from Paolo P. Lava)
%e A032537 7 in base 3 is 21, which interpreted in base 10 is 21=3*7.
%t A032537 lst = {0}; Do[If[Mod[FromDigits[IntegerDigits[n, 3]], n] == 0, AppendTo[lst, n]], {n, 10000}]; lst (* _Carl Najafi_, Aug 21 2011 *)
%Y A032537 Cf. A032536, A032538.
%K A032537 nonn,base
%O A032537 1,3
%A A032537 _Patrick De Geest_, Apr 15 1998
%E A032537 Example and better description from _Erich Friedman_, Jul 21 2001
%E A032537 Edited by _Erich Friedman_ Feb 09 2002
%E A032537 Offset set to 1 by _Giovanni Resta_, Jul 13 2016
%E A032537 Name edited by _Jon E. Schoenfield_, Oct 25 2019