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 A161960 #3 Mar 31 2012 10:31:25
%S A161960 1,2,3,3,11,15,9,11,5,6,17,1,11,8,9,61,11,9,39,85,23,11,35,38,61,43,
%T A161960 137,73,77,162,43,181,191,40,35,73,1,20,251,263,137,283,295,17,319,7,
%U A161960 19,17,367,42,131,409,421,217,445,457,237,487,503,173,133,61,47,289,1,609,156
%N A161960 Numerators to accompany A161961.
%t A161960 Table[PrimePi[n^2]/(n*PrimePi[n]),{n,1,100}]
%Y A161960 Cf. A161961.
%K A161960 nonn,frac
%O A161960 2,2
%A A161960 _Daniel Tisdale_, Jun 22 2009
%E A161960 More terms from _R. J. Mathar_, Oct 05 2009