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 A171538 #8 Jan 07 2020 11:22:53 %S A171538 6,7,6,1,2,3,4,0,3,7,8,2,8,1,3,2,6,2,0,0,7,6,9,4,6,6,1,8,9,2,7,5,6,2, %T A171538 3,4,1,0,4,6,2,8,7,1,2,0,9,0,7,8,1,7,5,1,1,8,6,2,5,3,6,7,6,4,7,3,4,6, %U A171538 5,4,2,3,8,9,7,7,8,8,9,1,8,4,8,7,5,1,4,5,7,4,5,3,5,2,1,2,4,7,7,4,9,5,8,4,2 %N A171538 Decimal expansion of 4/sqrt(35). %C A171538 The absolute value of the Clebsch-Gordan coupling coefficient <j1 j2; m1 m2 | J M> = <2 3/2 ; -2 1/2 | 5/2 -3/2>. %H A171538 Daniel Starodubtsev, <a href="/A171538/b171538.txt">Table of n, a(n) for n = 0..10000</a> %H A171538 Wikipedia, <a href="https://en.wikipedia.org/wiki/Table_of_Clebsch%E2%80%93Gordan_coefficients">Table of Clebsch-Gordan coefficients</a> %F A171538 equals 4/A010490 = 2*A171543 . %e A171538 sqrt(16/35) = 0.67612340378281326200769466... %t A171538 RealDigits[4/Sqrt[35],10,120][[1]] (* _Harvey P. Dale_, Mar 29 2018 *) %K A171538 cons,easy,nonn %O A171538 0,1 %A A171538 _R. J. Mathar_, Dec 11 2009