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 A005787 M1904 #19 Apr 30 2020 21:40:22 %S A005787 2,8,112,5856,869824 %N A005787 Reachable configurations on n circles. %D A005787 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005787 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a005/A005787.java">Java program</a> (github) %H A005787 D. Rubinstein, Jeffrey Shallit and M. Szegedy, <a href="http://dx.doi.org/10.1145/63039.63046">A subset coloring algorithm and its application to computer graphics</a>, Commun. ACM, 31 (1988), 1228-1232. %K A005787 nonn,nice,hard,more %O A005787 1,1 %A A005787 _N. J. A. Sloane_, _Jeffrey Shallit_ %E A005787 a(5) from _Sean A. Irvine_, Apr 30 2020