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 A090766 #2 Jun 29 2008 03:00:00 %S A090766 1,2,18,1200,735000,4667544000,332086420512000,279394363051195392000 %N A090766 Duplicate of A069651. %K A090766 dead %O A090766 0,2