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 A186984 #8 Mar 30 2012 17:37:34
%S A186984 8,8,73,75,79,81,420,428,719,750,1014,1056,3632,3640,10167,11603,
%T A186984 12570,13180,14698,14930,36325,38118,41241,42243,92553,93093,186945,
%U A186984 195339,203985,213681,401403,407475,549417,563277,608091,633633,1106226
%N A186984 Number of 8-element subsets of {1, 2, ..., n} having pairwise coprime elements.
%H A186984 Alois P. Heinz, <a href="/A186984/b186984.txt">Table of n, a(n) for n = 17..200</a>
%e A186984 a(17) = 8 because there are 8 8-element subsets of {1, 2, ..., 17} having pairwise coprime elements: {1,2,3,5,7,11,13,17}, {1,2,5,7,9,11,13,17}, {1,3,4,5,7,11,13,17}, {1,3,5,7,8,11,13,17}, {1,3,5,7,11,13,16,17}, {1,4,5,7,9,11,13,17}, {1,5,7,9,11,13,16,17}, {1,5,7,8,9,11,13,17}.
%Y A186984 Column 8 of triangle A186974. Partial sums of A186979.
%K A186984 nonn
%O A186984 17,1
%A A186984 _Alois P. Heinz_, Mar 02 2011