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 A171622 #4 Feb 19 2013 18:39:30
%S A171622 1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,
%T A171622 3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4
%N A171622 Floor(n-th noncomposite / n).
%C A171622 a(n)= floor(A008578(n)/A000027(n)) = floor(A008578(n)/n). Numerators of (A008578(n)/A000027(n)) in A171525(n), denominators of (A008578(n)/A000027(n)) in A171526(n).
%t A171622 nn=100;With[{ncs=Join[{1},Prime[Range[nn]]]},Floor[#[[1]]/#[[2]]]&/@ Thread[ {ncs, Range[nn+1]}]] (* _Harvey P. Dale_, Feb 19 2013 *)
%K A171622 nonn
%O A171622 1,8
%A A171622 _Jaroslav Krizek_, Dec 13 2009