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 A018286 #19 Mar 21 2014 01:54:59 %S A018286 1,3,5,7,15,21,35,105 %N A018286 Divisors of 105. %H A018286 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018286 Divisors[105] (* _Vladimir Joseph Stephan Orlovsky_, Dec 04 2010 *) %o A018286 (PARI) divisors(105) %K A018286 nonn,fini,full,easy %O A018286 1,2 %A A018286 _N. J. A. Sloane_