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 A067163 #12 Mar 31 2012 10:22:54 %S A067163 0,1,1,3,4,9,12,14,18,27,40,42,53,53,76,79,120,130,130,154,192,195, %T A067163 250,273,321,264,417,403,472,497,585,519,686,717,794,819,904,885,1066, %U A067163 1075,1230,1326,1473,1393,1643,1751,1924,1986,2059,2109,2422,2457,2705,2727 %N A067163 A067151(n)/n. %D A067163 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 A067163 Sascha Kurz, <a href="http://www.mathe2.uni-bayreuth.de/sascha/oeis/drawing/drawing.html">m-gons in regular n-gons</a> %H A067163 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 A067163 <a href="/index/Pol#Poonen">Sequences formed by drawing all diagonals in regular polygon</a> %Y A067163 Cf. A067151. %K A067163 easy,nonn %O A067163 5,4 %A A067163 _Sascha Kurz_, Jan 06 2002