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 A186986 #6 Mar 30 2012 17:37:34
%S A186986 8,8,16,16,24,24,268,268,1569,1857,1952,2010,2156,2176,9265,9596,
%T A186986 10167,10339,35489,35589,103267,107303,111153,115675,297827,301611,
%U A186986 442057,451649,484539,503173,1150127,1164141,1290703,1320491,1413885,1471627
%N A186986 Number of 10-element subsets of {1, 2, ..., n} having pairwise coprime elements.
%H A186986 Alois P. Heinz, <a href="/A186986/b186986.txt">Table of n, a(n) for n = 23..200</a>
%e A186986 a(24) = 8 because there are 8 10-element subsets of {1, 2, ..., 24} having pairwise coprime elements: {1,2,3,5,7,11,13,17,19,23}, {1,2,5,7,9,11,13,17,19,23}, {1,3,4,5,7,11,13,17,19,23}, {1,3,5,7,8,11,13,17,19,23}, {1,3,5,7,11,13,16,17,19,23}, {1,4,5,7,9,11,13,17,19,23}, {1,5,7,8,9,11,13,17,19,23}, {1,5,7,9,11,13,16,17,19,23}.
%Y A186986 Column 10 of triangle A186974. Partial sums of A186981.
%K A186986 nonn
%O A186986 23,1
%A A186986 _Alois P. Heinz_, Mar 02 2011