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 A027894 #24 Jul 08 2025 17:57:38 %S A027894 1,3,9,11,33,99,101,303,909,1111,3333,9999 %N A027894 Divisors of 9999. %H A027894 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %p A027894 with(numtheory): divisors(9999); # _Wesley Ivan Hurt_, Jul 08 2014 %t A027894 Divisors[9999] (* _Wesley Ivan Hurt_, Jul 08 2014 *) %o A027894 (PARI) divisors(9999) \\ _Michel Marcus_, Jul 08 2014 %o A027894 (PARI) fordiv(9999, d, print1(d, ", ")) \\ _Michel Marcus_, Jul 08 2014 %K A027894 nonn,fini,full,easy %O A027894 1,2 %A A027894 _N. J. A. Sloane_