This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A171548 #14 Sep 08 2022 08:45:50 %S A171548 4,7,8,0,9,1,4,4,3,7,3,3,7,5,7,4,5,5,9,8,7,5,2,6,8,7,1,8,7,7,2,4,9,9, %T A171548 9,3,9,3,8,7,5,1,6,3,9,5,9,9,2,4,1,2,5,7,0,3,4,9,6,6,5,9,6,0,4,5,9,5, %U A171548 3,5,8,4,3,3,9,6,0,9,7,1,9,9,0,3,3,2,2,6,9,2,5,5,1,4,0,0,8,7,7,8,0,8,7,9,9 %N A171548 Decimal expansion of 2*sqrt(2/35). %C A171548 The absolute value of the Clebsch-Gordan coupling coefficient < j1 j2; m1 m2 | J M > = < 2 2; -1 1 | 4 0 >. %H A171548 G. C. Greubel, <a href="/A171548/b171548.txt">Table of n, a(n) for n = 0..10000</a> %H A171548 Wikipedia, <a href="http://en.wikipedia.org/wiki/Table_of_Clebsch-Gordan_coefficients">Table of Clebsch-Gordan coefficients</a>. %F A171548 Equals A010466/A010490 = A171543*A010465. %e A171548 Sqrt(8/35) = 2*sqrt(70)/35 = 0.478091443733757455987526871877249993.. %t A171548 RealDigits[2*Sqrt[2/35], 10, 100][[1]] (* _G. C. Greubel_, Oct 02 2018 *) %o A171548 (PARI) 2*sqrt(2/35) \\ _Michel Marcus_, Dec 23 2015 %o A171548 (Magma) SetDefaultRealField(RealField(100)); 2*Sqrt(2/35); // _G. C. Greubel_, Oct 02 2018 %Y A171548 Cf. A010465, A010466, A010490, A171543. %K A171548 cons,easy,nonn %O A171548 0,1 %A A171548 _R. J. Mathar_, Dec 11 2009