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 A127565 #5 Sep 09 2013 08:45:58
%S A127565 -1,-1,0,0,1,2,3,4,5,7,8,9,10,12,13,15,16,17,19,20,22,23,25,26,28,29,
%T A127565 31,32,34,35,37,39,40,42,43,45,47,48,50,51,53,55,56,58,60,61,63,65,66,
%U A127565 68,70,72,73,75,77,78,80,82,84,85,87,89,91,92,94,96,98,99,101,103,105,106,108,110,112,113,115,117,119,121,122,124,126
%N A127565 Floor (sum_{k=1..n} log(log(prime(k)))).
%t A127565 Table[Floor[N[Sum[Log[Log[Prime[x]]], {x, 1, n}]]], {n, 1, 1000}]
%Y A127565 Cf. A016040.
%K A127565 sign
%O A127565 1,6
%A A127565 _Artur Jasinski_, Jan 18 2007