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 A048252 #18 May 14 2018 05:59:27
%S A048252 1,5,22,187,1219,7597,46117,278857,1676377,10067797,60450517,
%T A048252 362758177,2176626817,13060193977,78363525817,470183516857,
%U A048252 2820894903487,16926601754197,101559860054047,609359671998037,3656158318966357
%N A048252 Largest number whose sum of divisors is 6^n.
%C A048252 Terms of this sequence are products of distinct terms in A005105. - _Ray Chandler_, Sep 01 2010
%H A048252 Ray Chandler, <a href="/A048252/b048252.txt">Table of n, a(n) for n = 0..1000</a>
%o A048252 (PARI) a(n) = {sn = 6^n; forstep(x=sn, 1, -1, if (sigma(x) == sn, return (x)););} \\ _Michel Marcus_, Dec 15 2013
%Y A048252 Cf. A006532, A020477, A019422, A019423, A018427, A048251-A048256.
%K A048252 nonn
%O A048252 0,2
%A A048252 _Labos Elemer_
%E A048252 a(9)-a(14) from _Donovan Johnson_, Sep 02 2008
%E A048252 a(15)-a(20) from _Donovan Johnson_, Nov 22 2008
%E A048252 Edited and extended by _Ray Chandler_, Sep 01 2010