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 A019811 #17 Aug 21 2023 11:47:07 %S A019811 0,3,4,8,9,9,4,9,6,7,0,2,5,0,0,9,7,1,6,4,5,9,9,5,1,8,1,6,2,5,3,3,2,9, %T A019811 3,7,3,5,4,8,2,4,5,7,6,0,4,3,2,9,6,8,7,1,4,2,5,0,0,5,7,6,6,9,4,2,0,8, %U A019811 4,0,5,1,2,1,3,8,2,1,3,2,5,4,5,1,1,2,3,1,5,1,4,5,9,0,2,8,5,6,5,2 %N A019811 Decimal expansion of sine of 2 degrees. %C A019811 An algebraic number of degree 12 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017 %H A019811 Ivan Panchenko, <a href="/A019811/b019811.txt">Table of n, a(n) for n = 0..1000</a> %H A019811 <a href="/index/Al#algebraic_12">Index entries for algebraic numbers, degree 12</a> %F A019811 Equals 2*A019810*A019898. - _R. J. Mathar_, Jan 17 2021 %e A019811 0.034899... %o A019811 (PARI) sin(Pi/90) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019811 nonn,cons %O A019811 0,2 %A A019811 _N. J. A. Sloane_ %E A019811 Zero added in front by _R. J. Mathar_, Feb 05 2009