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 A215933 #7 Aug 28 2012 18:24:29 %S A215933 0,0,2,8,17,41,61,69,152,216,204,383,464,447,791,978,822,1302,1684, %T A215933 1387,2347,2726,2012,3620,4005,3218,5274,5461,4538,7429,8267,6095, %U A215933 9395,11261,8404,13465,14777,10172,16810,19007,14138,22276,22334,17646,28094,29066 %N A215933 A bisection of A183168. %Y A215933 Cf. A183168, A215934. %K A215933 nonn %O A215933 0,3 %A A215933 _N. J. A. Sloane_, Aug 27 2012