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 A050637 #8 Mar 05 2015 12:19:18 %S A050637 2,8,42,2458,310042,2929997542,1046218875000310042, %T A050637 406005268741864709999999997070002458, %U A050637 50376698115810287966925579573179705000000000000000001046218875000310042 %N A050637 a(1) = 2; a(n+1)^2 is next smallest square ending with a(n)^2. %Y A050637 Cf. A050636, A048560, A050631, A061361. %Y A050637 See A065789 for an essentially identical sequence. %K A050637 nonn,base %O A050637 1,1 %A A050637 _Patrick De Geest_, Jul 15 1999 %E A050637 More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Nov 06 2001