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 A251642 #6 Dec 24 2014 22:59:51 %S A251642 1,2,4,8,9,16,18,32,40,64,80,81,128,160,162,200,256,320,324,400,512, %T A251642 640,648,800,1024,1280,1296,1600,2048,2176,2560,2592,3200,4096,4352, %U A251642 4400,5000,5120,5184,6400,8192,8704,8800,10000,10240,10368,12800,16384,17408,17600,20000,20480,22000,25000,25600,32768,34816,36992,40000,40960,43520,44000,50000,51200,65536,69632,73984,80000,81920,87040,88000,100000,102400,131072,139264,147968 %N A251642 Records values in A072994. %Y A251642 Cf. A072994. %K A251642 nonn %O A251642 1,2 %A A251642 _Robert G. Wilson v_, Dec 06 2014