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 A156069 #11 Dec 02 2013 04:33:55 %S A156069 3,19,127,954,7633,63609,545221,4770684,42406081 %N A156069 a(n) = A156071(n)/n. %H A156069 Blaine, <a href="http://puzzles.blainesville.com/2008/01/how-about-math-puzzle.html#comments">How about a math puzzle?</a> %H A156069 Albert Franck, <a href="http://www.paulcooijmans.com/others/puzfrank.html">Puzzles</a>, see item 7. %Y A156069 Cf. A156071, A163574. %K A156069 nonn,base,fini,full %O A156069 1,1 %A A156069 _Alexander R. Povolotsky_, Sep 25 2009 %E A156069 New name from _Michel Marcus_, Dec 01 2013