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 A018509 #18 Jul 08 2025 06:55:57 %S A018509 1,2,3,4,5,6,9,10,12,15,18,20,27,30,36,45,54,60,90,108,135,180,270,540 %N A018509 Divisors of 540. %H A018509 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018509 Divisors[540] (* _Harvey P. Dale_, Aug 27 2017 *) %o A018509 (PARI) divisors(540) \\ _Charles R Greathouse IV_, Jun 21 2017 %Y A018509 Cf. A134950. %K A018509 nonn,fini,full,easy %O A018509 1,2 %A A018509 _N. J. A. Sloane_