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 A067168 #11 Mar 31 2012 10:22:54 %S A067168 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,3,0,0, %T A067168 2,1,0,0,0,0,0,1,0,0,0,3,0,2,0,2,2,1,2,0,3,3,1,1,4,2,0,8,5,2,3,8,0,3, %U A067168 2,3,10,7,5,8,1,3,4,2,4,3,4,9,4,12,9,10,3,8,9,16,11,12,3,2,10,15,21,16,12 %N A067168 A067156(n)/n. %D A067168 B. Poonen and M. Rubinstein, Number of Intersection Points Made by the Diagonals of a Regular Polygon, SIAM J. Discrete Mathematics, Vol. 11, pp. 135-156. %H A067168 Sascha Kurz, <a href="http://www.mathe2.uni-bayreuth.de/sascha/oeis/drawing/drawing.html">m-gons in regular n-gons</a> %H A067168 B. Poonen and M. Rubinstein, <a href="http://math.mit.edu/~poonen/">The number of intersection points made by the diagonals of a regular polygon</a>, SIAM J. on Discrete Mathematics, Vol. 11, No. 1, 135-156 (1998). %H A067168 <a href="/index/Pol#Poonen">Sequences formed by drawing all diagonals in regular polygon</a> %Y A067168 Cf. A067156. %K A067168 easy,nonn %O A067168 10,32 %A A067168 _Sascha Kurz_, Jan 06 2002