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%I #5 Jan 02 2022 12:04:45
%S 7,5,5,9,2,8,9,4,6,0,1,8,4,5,4,4,5,4,4,2,9,0,3,3,0,7,2,4,6,8,3,6,0,1,
%T 2,1,6,3,1,5,0,2,6,2,3,7,3,7,8,4,2,9,0,8,6,7,6,6,6,6,9,8,8,3,4,3,1,6,
%U 2,5,2,0,9,2,2,9,3,8,1,7,9,3,6,0,1,1,2,2,5,3,2,7,8,4,4,1,0,3,1,6,0,4,3,0,4
%N Decimal expansion of 2/sqrt(7).
%C The absolute value of the Clebsch-Gordan coupling coefficient <j1 j2; m1 m2 | J M> = <2 3/2 ; -2 -1/2 | 5/2 -5/2>.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Table_of_Clebsch%E2%80%93Gordan_coefficients">Table of Clebsch-Gordan coefficients</a>
%F equals 2*A020764 = 2/A010465.
%e sqrt(4/7) = 0.75592894601845445442903307...
%t RealDigits[2/Sqrt[7],10,120][[1]] (* _Harvey P. Dale_, Jan 02 2022 *)
%K cons,easy,nonn
%O 0,1
%A _R. J. Mathar_, Dec 11 2009