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 A186993 #9 Mar 30 2012 17:37:34
%S A186993 1,2,4,4,12,4,28,16,32,12,116,16,248,48,72,112,728,64,1520,192,384,
%T A186993 256,3864,256,3160,736,2744,832,15220,256,29639,7068,6167,4032,9439,
%U A186993 1770,81966,8940,15305,5423,175539,2949,311499,31099,33019
%N A186993 Number of subsets of {1, 2, ..., n} containing n and having <=9 pairwise coprime elements.
%H A186993 Alois P. Heinz, <a href="/A186993/b186993.txt">Table of n, a(n) for n = 1..200</a>
%Y A186993 Column 9 of triangle A186975. Sum of A186992 and A186980.
%K A186993 nonn
%O A186993 1,2
%A A186993 _Alois P. Heinz_, Mar 03 2011