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 A084651 #3 Jan 09 2009 03:00:00 %S A084651 2,13,21,198,595,793,1774,85505,1125339,31105498,52395920,58911095, %T A084651 70815266,137411174,285246559,641084601,1269499901,60923201300, %U A084651 181605462455,292802733746,980702252022,2825619545276,6954435355458 %N A084651 Engel expansion for cos(1). %Y A084651 Cf. A067919, A084652. %K A084651 nonn %O A084651 0,1 %A A084651 Hauke Worpel (hw1(AT)email.com), Jun 01 2003