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 A187266 #6 Mar 30 2012 17:37:34
%S A187266 1,3,7,11,23,27,55,71,103,115,225,241,450,496,565,663,1170,1227,2055,
%T A187266 2196,2473,2666,4257,4420,5709,6122,7223,7664,11449,11612,16776,18255,
%U A187266 19991,21178,23718,24327,33888,35767,38853,40157,54455
%N A187266 Number of nonempty subsets of {1, 2, ..., n} with <=5 pairwise coprime elements.
%H A187266 Alois P. Heinz, <a href="/A187266/b187266.txt">Table of n, a(n) for n = 1..200</a>
%F A187266 a(n) = A187262(n,5).
%Y A187266 Column 5 of triangle A187262. First differences are A186989.
%K A187266 nonn
%O A187266 1,2
%A A187266 _Alois P. Heinz_, Mar 07 2011