A171545 - OEIS

%I #13 Sep 08 2022 08:45:50

%S 5,3,4,5,2,2,4,8,3,8,2,4,8,4,8,7,6,9,3,6,9,1,0,6,9,6,1,7,5,9,5,0,7,0,

%T 4,3,1,0,8,0,0,2,8,2,9,6,8,2,6,7,5,2,7,8,0,4,3,3,9,2,2,0,9,6,1,7,1,4,

%U 7,8,7,9,4,7,2,4,1,9,8,6,1,1,3,9,5,4,4,2,7,0,7,4,2,0,5,4,2,2,4,5,0,0,1,4,1

%N Decimal expansion of sqrt(2/7).

%C The absolute value of the Clebsch-Gordan coupling coefficient <j1 j2; m1 m2 | J M> = <2 3/2 ; 0 -3/2 | 7/2 -3/2>.

%H G. C. Greubel, <a href="/A171545/b171545.txt">Table of n, a(n) for n = 0..10000</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Table_of_Clebsch%E2%80%93Gordan_coefficients">Table of Clebsch-Gordan coefficients</a>

%F Equals A002193/A010465 = 2/A010471 = A010467/A010490.

%e sqrt(2/7) = sqrt(14)/7 = 0.53452248382484876936910696175950...

%t RealDigits[N[Sqrt[2/7],200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Mar 04 2011*)

%o (PARI) default(realprecision, 100); sqrt(2/7) \\ _G. C. Greubel_, Oct 02 2018

%o (Magma) SetDefaultRealField(RealField(100)); Sqrt(2/7); // _G. C. Greubel_, Oct 02 2018

%K cons,easy,nonn

%O 0,1

%A _R. J. Mathar_, Dec 11 2009