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 A018766 #14 Jun 14 2014 02:40:02 %S A018766 1,3,9,27,37,111,333,999 %N A018766 Divisors of 999. %H A018766 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018766 Divisors[999] (* _Wesley Ivan Hurt_, Jun 14 2014 *) %o A018766 (PARI) divisors(999) \\ _Wesley Ivan Hurt_, Jun 14 2014 %K A018766 nonn,fini,full,easy %O A018766 1,2 %A A018766 _N. J. A. Sloane_, Dec 11 1996