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 A019833 #28 Aug 31 2025 11:16:01 %S A019833 4,0,6,7,3,6,6,4,3,0,7,5,8,0,0,2,0,7,7,5,3,9,8,5,9,9,0,3,4,1,4,9,7,6, %T A019833 1,2,9,2,3,1,3,9,6,5,1,0,6,6,1,7,3,4,3,6,2,9,4,2,8,6,3,5,2,8,1,7,0,3, %U A019833 7,7,7,6,5,2,4,5,4,6,4,0,5,0,7,0,8,0,2,1,7,0,5,2,0,6,1,9,5,9,3 %N A019833 Decimal expansion of sine of 24 degrees. %C A019833 An algebraic number of degree 8 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017 %H A019833 Ivan Panchenko, <a href="/A019833/b019833.txt">Table of n, a(n) for n = 0..1000</a> %H A019833 Wikipedia, <a href="https://en.wikipedia.org/wiki/Exact_trigonometric_constants">Exact trigonometric constants</a> %H A019833 <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a> %F A019833 Equals sin(2*Pi/15) = sqrt(1-A019875^2) = 2*A019821*A019887. - _R. J. Mathar_, Jun 18 2006 %F A019833 One of the 8 real-valued roots of 256*x^8-448*x^6+224*x^4-32*x^2+1=0. - _R. J. Mathar_, Aug 31 2025 %o A019833 (PARI) sin(2*Pi/15) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019833 nonn,cons,changed %O A019833 0,1 %A A019833 _N. J. A. Sloane_