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 A046836 #5 Mar 30 2012 18:35:36 %S A046836 50,60,250,500,600,760,2500,3760,3792,5000,6000,6250,7600,14651,25000, %T A046836 37600,50000,60000,62500,76000,93760,250000,376000,495475,500000, %U A046836 505025,600000,625000,760000,906250,937600,971582,1093760,1713526 %N A046836 Internal digits of n^2 include digits of n as substring. %K A046836 nonn,base %O A046836 1,1 %A A046836 _David W. Wilson_