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 A018267 #16 Jul 08 2025 06:34:15 %S A018267 1,3,7,9,21,63 %N A018267 Divisors of 63. %H A018267 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018267 Divisors[63] (* _Wesley Ivan Hurt_, Sep 04 2022 *) %o A018267 (PARI) divisors(63) \\ _Charles R Greathouse IV_, Jun 22 2017 %K A018267 nonn,fini,full,easy %O A018267 1,2 %A A018267 _N. J. A. Sloane_