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 A196566 #15 May 15 2019 12:36:57 %S A196566 4,7,5,8,8,4,9,9,5,3,2,7,1,1,0,6,2,1,0,2,2,5,1,7,2,1,3,5,5,6,5,6,8,4, %T A196566 9,9,6,1,7,5,4,9,7,8,6,1,7,4,9,9,7,4,9,9,7,4,8,2,8,3,2,0,5,3,0,1,7,8, %U A196566 5,6,3,3,5,7,5,0,3 %N A196566 Decimal expansion of log(log(5)). %e A196566 log(log(5)) = 0.4758849953271106210... %t A196566 RealDigits[Log[Log[5]],10,120][[1]] (* _Harvey P. Dale_, Mar 19 2019 *) %o A196566 (PARI) log(log(5)) \\ _Charles R Greathouse IV_, May 15 2019 %Y A196566 Cf. A016628, A194562, A074785. %K A196566 nonn,easy,cons %O A196566 0,1 %A A196566 _Kausthub Gudipati_, Oct 04 2011