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 A001180 M0442 N0165 #7 Jun 01 2010 03:00:00 %S A001180 1,1,2,3,3,5,9,16,28,50,89,159,285,510,914,1639,2938,5269,9451,16952 %N A001180 Erroneous version of A002572. %D A001180 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A001180 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %K A001180 dead %O A001180 1,3