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 A110890 #4 Jun 23 2015 11:20:38 %S A110890 1,1,0,1,1,3,0,12,5,83,0,808,47 %N A110890 Number of spindle configurations of n skew lines, up to isotopy, which are amphichiral. %C A110890 a(n)=0 for n=3 (mod 4) %H A110890 R. Bacher and D. Garber, <a href="http://www.ams.org/mathscinet-getitem?mr=2326942">Spindle configurations of skew lines</a> %K A110890 more,nonn %O A110890 1,6 %A A110890 _David Garber_, Sep 20 2005