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 A018262 #18 Oct 06 2017 04:52:36 %S A018262 1,2,5,10,25,50 %N A018262 Divisors of 50. %H A018262 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018262 Divisors[50] (* _Alonso del Arte_, Oct 05 2017 *) %o A018262 (PARI) divisors(50) \\ _Charles R Greathouse IV_, Jun 21 2017 %K A018262 nonn,fini,full,easy %O A018262 1,2 %A A018262 _N. J. A. Sloane_