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 A114393 #2 Mar 31 2012 13:21:10 %S A114393 1,2,5,4,10,9,8,20,18,17,16,40,41,36,34,33,32,80,82,72,68,66,65,64, %T A114393 160,164,144,145,136,132,130,129,128,325,320,328,288,290,272,264,260, %U A114393 258,257,256,650,645,640,656,576,580,544,545,528,520,516,514,513,512 %N A114393 Square roots of A114392. %Y A114393 A114392(n) = a(n)^2. %K A114393 nonn %O A114393 1,2 %A A114393 _Antti Karttunen_, Feb 07 2006