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 A187269 #6 Mar 30 2012 17:37:34
%S A187269 1,3,7,11,23,27,55,71,103,115,231,247,495,543,615,727,1455,1519,3031,
%T A187269 3223,3607,3863,7646,7901,10987,11719,14393,15219,29383,29638,55637,
%U A187269 61912,67681,71466,80284,81965,149001,156985,170628
%N A187269 Number of nonempty subsets of {1, 2, ..., n} with <=8 pairwise coprime elements.
%H A187269 Alois P. Heinz, <a href="/A187269/b187269.txt">Table of n, a(n) for n = 1..200</a>
%F A187269 a(n) = A187262(n,8).
%Y A187269 Column 8 of triangle A187262. First differences are A186992.
%K A187269 nonn
%O A187269 1,2
%A A187269 _Alois P. Heinz_, Mar 07 2011