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 A019867 #23 Aug 21 2023 11:47:12 %S A019867 8,4,8,0,4,8,0,9,6,1,5,6,4,2,5,9,7,0,3,8,6,1,7,6,1,7,8,6,9,0,3,8,6,4, %T A019867 4,8,7,2,8,7,1,2,0,5,5,9,5,6,2,4,5,3,5,9,0,5,1,8,6,1,9,6,1,1,2,8,3,1, %U A019867 3,2,3,1,5,9,6,4,2,4,9,2,2,8,4,8,0,4,8,5,2,9,0,4,4,7,2,7,6,9,7 %N A019867 Decimal expansion of sine of 58 degrees. %C A019867 An algebraic number of degree 12 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017 %H A019867 Ivan Panchenko, <a href="/A019867/b019867.txt">Table of n, a(n) for n = 0..1000</a> %H A019867 <a href="/index/Al#algebraic_12">Index entries for algebraic numbers, degree 12</a> %F A019867 Equals cos(8*Pi/45) = 2F1(23/30,7/30;1/2;3/4) / 2. - _R. J. Mathar_, Oct 27 2008 %F A019867 Equals 2*A019838*A019870. - _R. J. Mathar_, Jan 17 2021 %e A019867 0.84804809... %t A019867 RealDigits[Sin[58 Degree],10,120][[1]] (* _Harvey P. Dale_, Apr 24 2018 *) %o A019867 (PARI) cos(8*Pi/45) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019867 nonn,cons %O A019867 0,1 %A A019867 _N. J. A. Sloane_