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%I #15 Jun 13 2020 07:57:09
%S 7,7,8,0,9,4,4,8,9,1,7,5,1,7,9,4,3,2,8,9,0,1,3,4,6,2,5,9,4,9,1,8,1,7,
%T 1,2,5,2,4,7,6,3,2,2,8,9,7,9,7,6,6,6,7,8,9,1,4,3,7,3,2,4,0,8,5,8,5,7,
%U 0,1,1,7,4,8,0,7,7,6,9,9,5,4,6,0,1,7,5,9,7,4,8,3,8,3,2,8,4,9,2,5,3,7
%N Decimal expansion of 6/(Pi^2 A086724).
%C The probability that a randomly chosen Eisenstein integer is squarefree, and the probability that two randomly chosen Eisenstein integers are coprime. - _Amiram Eldar_, Jun 13 2020
%D Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, p. 601.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/RelativelyPrime.html">Relatively Prime</a>
%e 0.778094489...
%t A086724 = H = 1+(PolyGamma[1, 4/3]-PolyGamma[1, 2/3])/9; RealDigits[6/(Pi^2*H), 10, 102] // First (* _Jean-François Alcover_, Jun 03 2014 *)
%Y Cf. A088454, A086724.
%K nonn,cons
%O 0,1
%A _Eric W. Weisstein_, Oct 02 2003
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