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 A141718 #7 Oct 31 2011 21:03:25 %S A141718 1,4,8,16,18,32,36,50,54,64,72,100,108,128,144,162,200,216,250,256, %T A141718 288,294,324,400,432,450,486,500,512,576,578,588,648,800,864,882,900, %U A141718 972,1000,1014,1024,1152,1156,1176,1210,1250,1296,1350,1458,1600,1728,1764 %N A141718 Duplicate of A055744. %K A141718 dead %O A141718 1,2