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 A050635 #6 Oct 15 2019 00:01:45 %S A050635 1,9,41,1209,469959,176270001209,6042408942999999530041, %T A050635 16385871165869048127200000000000176270001209, %U A050635 28444329561227422116741433513058707457037799999999999999999999993957591057000000469959 %N A050635 a(n+1)^2 is next smallest square ending with a(n)^2, initial term is 1. %Y A050635 Cf. A050634, A048558, A050629. %K A050635 nonn,base %O A050635 1,2 %A A050635 _Patrick De Geest_, Jul 15 1999 %E A050635 More terms from Jonathan Cross (jcross(AT)wcox.com), Oct 09 2001