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 A069659 #5 Dec 05 2013 19:55:16 %S A069659 9,81,961,9801,99856,998001,9998244,99980001,999950884,9999800001, %T A069659 99999515529,999998000001,9999995824729,99999980000001, %U A069659 999999961946176,9999999800000001,99999999989350756,999999998000000001 %N A069659 Largest n-digit perfect power. %C A069659 Are there terms which are not perfect squares? In other words, when (if ever) does this differ from A061433. %C A069659 Trivially, 81 is both a square and a fourth power. Assuming my program works, there are no differences in the first 1500 terms. - Hans Havermann, Aug 06 2006 %Y A069659 Cf. A061433. %K A069659 nonn,base %O A069659 1,1 %A A069659 _Amarnath Murthy_, Apr 04 2002 %E A069659 More terms from _Ryan Propper_, Oct 10 2005