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 A144772 #18 Feb 15 2020 10:39:25 %S A144772 1,1,10,190,5320,196840,9054640,498005200,31872332800,2326680294400, %T A144772 190787784140800,17361688356812800,1736168835681280000, %U A144772 189242403089259520000,22330603564532623360000 %N A144772 Duplicate of A045756. %K A144772 dead %O A144772 0,3