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 A099877 #6 May 09 2015 17:32:56 %S A099877 1,7,9,6,2,2,6,8,3,6,9,3,5,7,1,8,0,3,1,6,4,0,0,1,5,0,4,2,3,2,6,5,9,7, %T A099877 5,8,9,5,4,2,2,6,6,3,5,5,3,4,5,1,6,9,2,5,2,9,9,6,0,0,2,8,1,2,5,5,4,7, %U A099877 4,9,6,8,3,6,9,2,2,9,7,0,9,1,8,0,8,8,7,9,3,2,6,1,5,9,6,1,6,4,4,3,0 %N A099877 Decimal expansion of nested radical: Sqrt(1^2 + CubeRoot(2^3 + 4thRoot(3^4 + 5thRoot(4^5 + ... %H A099877 Chai Wah Wu, <a href="/A099877/b099877.txt">Table of n, a(n) for n = 1..10000</a> %e A099877 1.7962268369357180316400150423265975895... %o A099877 (PARI) t=0:forstep(n=100,1,-1,t=(t+n^(n+1))^(1/(n+1))) %Y A099877 Cf. A072449, A099874, A099876. %K A099877 cons,easy,nonn %O A099877 1,2 %A A099877 Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 02 2004