A187269 - OEIS

%I #6 Mar 30 2012 17:37:34

%S 1,3,7,11,23,27,55,71,103,115,231,247,495,543,615,727,1455,1519,3031,

%T 3223,3607,3863,7646,7901,10987,11719,14393,15219,29383,29638,55637,

%U 61912,67681,71466,80284,81965,149001,156985,170628

%N Number of nonempty subsets of {1, 2, ..., n} with <=8 pairwise coprime elements.

%H Alois P. Heinz, <a href="/A187269/b187269.txt">Table of n, a(n) for n = 1..200</a>

%F a(n) = A187262(n,8).

%Y Column 8 of triangle A187262.  First differences are A186992.

%K nonn

%O 1,2

%A _Alois P. Heinz_, Mar 07 2011