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 A173630 #8 Mar 30 2012 18:52:05 %S A173630 1,1,2,5,1,7,4,3,1,11,2,13,1,5,8,17,3,19,2,7,1,23,4,25,1,9,14,29,1,31 %N A173630 Denominator of A002445(n)/A145979(n). %C A173630 Fractions: 1,1,15/2,21/5,10,33/7,1365/4,1/3,102,... %C A173630 Second bisection is A146535(n+2). %Y A173630 A060789. %K A173630 nonn,less,frac %O A173630 0,3 %A A173630 _Paul Curtz_, Nov 23 2010