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 A236321 #13 Feb 26 2014 07:53:24 %S A236321 0,0,0,0,0,5,65,668,6711 %N A236321 Conjectured number of Riesel numbers less than 10^n. %H A236321 Wikipedia, <a href="http://en.wikipedia.org/wiki/Riesel_number">Riesel number</a> %F A236321 a(n) ~ A236320(n). %Y A236321 Cf. A076337, A101036, A236320, A237880. %K A236321 nonn,more %O A236321 1,6 %A A236321 _Arkadiusz Wesolowski_, Jan 22 2014