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 A196097 #13 Mar 30 2012 17:20:22 %S A196097 1,8,32,120,448,1672 %N A196097 Boundary of an n-ball in Novikov's hyperbolic triangular discretization of complex analysis. %C A196097 One can discretize complex analysis by finding equivalents of the Cauchy-Riemann operator on various tilings of the complex plane. One of the solutions explored by Novikov is a plane of negative curvature analog to the Lobatchevskii plane made from triangles of alternative colors (black and white). a(n) gives the first terms of the length of the boundary of after n iterations. %C A196097 Terms have been computed by Novikov and Mike Boyle. %D A196097 S.P. Novikov, New discretization of Complex Analysis: the Euclidean and Hyperbolic Planes, Proceedings of the Steklov Mathematical Institute of Mathematics, 273 (2011), 238-251. See pp248-250. %K A196097 nonn %O A196097 0,2 %A A196097 _Olivier Gérard_, Oct 27 2011