%I
%S 3,9,2,0,7,2,8,9,8,1,4,5,9,7,3,3,7,1,3,3,6,7,2,3,2,2,0,7,4,1,6,3,4,1,
%T 6,6,5,7,3,8,4,7,3,5,1,9,6,6,5,2,0,7,0,6,9,2,6,3,4,5,8,0,8,6,3,4,9,6,
%U 1,2,7,4,2,2,6,5,8,7,3,5,2,8,5,2,7,4,4,3,5,6,4,4
%N Decimal expansion of 1  6/Pi^2.
%C Probability that a random number is not squarefree; probability that two random numbers have a common divisor greater than 1.
%H Charles R Greathouse IV, <a href="/A229099/b229099.txt">Table of n, a(n) for n = 0..10000</a>
%e 0.39207289814597337133672322074163416657384735196652070692634580863496...
%o (PARI) 16/Pi^2
%Y Cf. A059956, A063035.
%K nonn,cons,easy
%O 0,1
%A _Charles R Greathouse IV_, Sep 13 2013
