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 A215418 #22 Aug 22 2012 00:26:26 %S A215418 1,-1,9,16,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, %T A215418 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 %N A215418 Number of Regular and Stellar polytopes in n-dimensional Euclidean space, or -1 if infinite. %C A215418 This is the number of Regular (including Stellar) polytopes in n-dimensions. %D A215418 H. S. M. Coxeter, Regular Polytopes, 3rd ed., Dover, NY, 1973. %K A215418 sign %O A215418 1,3 %A A215418 _Douglas Boffey_, Aug 12 2012