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 A019871 #15 Dec 27 2021 21:03:33 %S A019871 8,8,2,9,4,7,5,9,2,8,5,8,9,2,6,9,4,2,0,3,2,1,7,1,3,6,0,3,1,5,7,1,9,3, %T A019871 8,6,0,8,3,5,3,6,6,3,1,9,9,9,5,4,2,2,3,0,4,7,6,8,6,7,7,2,8,0,7,0,3,9, %U A019871 7,2,8,2,8,1,0,2,4,6,2,4,8,2,9,9,1,7,1,6,8,0,5,0,3,7,5,6,2,6,2 %N A019871 Decimal expansion of sine of 62 degrees. %C A019871 Am algebraic number of degree 12 and denominator 2. - _Charles R Greathouse IV_, Nov 06 2017 %H A019871 Ivan Panchenko, <a href="/A019871/b019871.txt">Table of n, a(n) for n = 0..1000</a> %F A019871 Equals cos(7*pi/45) = 2F1(11/15,4/15;1/2;3/4) / 2. - _R. J. Mathar_, Oct 27 2008 %F A019871 Equals 2*A019840*A019868. - _R. J. Mathar_, Jan 17 2021 %e A019871 0.882947592... %o A019871 (PARI) sin(31/90*Pi) \\ _Charles R Greathouse IV_, Nov 06 2017 %K A019871 nonn,cons %O A019871 0,1 %A A019871 _N. J. A. Sloane_