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 A027898 #14 Jul 02 2024 04:15:26 %S A027898 1,73,137,10001,99990001,7299270073,13698630137,1000000000001 %N A027898 Divisors of 10^12 + 1. %H A027898 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A027898 Divisors[10^12 + 1] (* _Paolo Xausa_, Jul 02 2024 *) %o A027898 (PARI) divisors(10^12+1) \\ _Charles R Greathouse IV_, Jun 21 2017 %K A027898 nonn,fini,full %O A027898 1,2 %A A027898 _N. J. A. Sloane_