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 A087637 #1 Feb 19 2004 03:00:00 %S A087637 1,0,0,2,2,0,0,115,41,0,961 %N A087637 Erroneous version of A052458. %D A087637 M. Kraitchik, Mathematical Recreations, 1942, see Section 7.10. %K A087637 dead %O A087637 1,4