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 A067635 #3 Mar 30 2012 18:35:41 %S A067635 1,4,13,36,113,487,1036,3267,10136,32043 %N A067635 a(1) = 1; set of digits of a(n)^2 is a proper subset of the set of digits of a(n+1)^2. %Y A067635 Cf. A014563, A066825. %K A067635 nonn,base,fini,full %O A067635 1,2 %A A067635 _David W. Wilson_, Feb 05 2002