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 A003525 #16 Oct 21 2023 23:32:34 %S A003525 1,3,43,127,129,381,5461,16383 %N A003525 Divisors of 2^14 - 1. %H A003525 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A003525 Divisors[2^14-1] (* _Harvey P. Dale_, Apr 19 2019 *) %o A003525 (PARI) divisors(2^14-1) \\ _Charles R Greathouse IV_, Jun 21 2017 %K A003525 nonn,fini,full,easy %O A003525 1,2 %A A003525 _N. J. A. Sloane_