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 A014559 #4 May 16 2003 03:00:00 %S A014559 1,2,6,19,53,216,760,2725,9910,39446,125268 %N A014559 Erroneous version of A001168. %D A014559 D. H. Riedelmeier, Counting polyominoes: yet another attack, Discrete Math., 36, 191-203, 1981. %K A014559 dead %O A014559 0,2