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 A050638 #6 Mar 05 2015 12:19:44 %S A050638 9,49,1849,1671849,24011671849,408646172724011671849, %T A050638 14079962896835441528408646172724011671849, %U A050638 30988070410883251650062468506470600085614079962896835441528408646172724011671849 %N A050638 a(n+1) is next smallest square ending with a(n), initial term is 9. %Y A050638 Cf. A050639, A048561, A050630. %K A050638 nonn,base %O A050638 1,1 %A A050638 _Patrick De Geest_, Jul 15 1999 %E A050638 More terms from Ulrich Schimke (ulrschimke(AT)aol.com), Nov 06 2001