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 A139181 #2 Mar 30 2012 17:37:44 %S A139181 2,415456,1575516,793709,423271,1271128,1278133,1482407,10,1721634,0 %N A139181 A139180(n)^(1/n). %e A139181 A139180(9)=10^9 so a(9)=(10^9)^(1/9)=10. %Y A139181 Cf. A139180. %K A139181 base,nonn %O A139181 1,1 %A A139181 _Farideh Firoozbakht_, Apr 24 2008