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 A092417 #2 Jan 09 2009 03:00:00 %S A092417 1,3,-4,12,144,576,-7104,45248,450432,2240512,5292544,-88076288, %T A092417 -62210048 %N A092417 Duplicate of A071543. %K A092417 dead %O A092417 0,2