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 A307617 #11 Aug 23 2019 13:44:14 %S A307617 1,2,4,6,12,60,120,360,840,2520,27720,55440,360360,720720,12252240, %T A307617 232792560,1163962800,3491888400,5354228880 %N A307617 Distinct terms in A307616. %Y A307617 A307616 with duplicates removed. %K A307617 nonn,more %O A307617 1,2 %A A307617 _Jack Zhang_, Apr 18 2019 %E A307617 a(12)-a(19) from _Rémy Sigrist_, Aug 23 2019