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 A130683 #21 Aug 08 2019 06:41:26 %S A130683 4,16,96,768,7680,92160,1290240,20643840,371589120,7431782400, %T A130683 163499212800,3923981107200,102023508787200,2856658246041600, %U A130683 85699747381248000,2742391916199936000,93241325150797824000,3356687705428721664000,127554132806291423232000 %N A130683 Duplicate of A032184. %K A130683 dead %O A130683 0,1 %A A130683 Gil Costa (gilpratacosta(AT)gmail.com), Jun 29 2007