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 A080515 #4 Dec 05 2013 19:56:00 %S A080515 2,25,125,1500625,7721159067190625,15177620126188504995068476821390625 %N A080515 a(1) = 2, a(n) = smallest n-th power obtained by inserting digits anywhere in a(n-1). %Y A080515 Cf. A080514, A080516. %K A080515 base,hard,more,nonn %O A080515 1,1 %A A080515 _Amarnath Murthy_, Mar 20 2003 %E A080515 More terms from _Robert Gerbicz_, Aug 24 2006