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 A019837 #21 Aug 21 2023 11:49:06 %S A019837 4,6,9,4,7,1,5,6,2,7,8,5,8,9,0,7,7,5,9,5,9,4,6,2,2,8,8,2,2,7,8,4,3,2, %T A019837 9,5,7,2,3,2,1,8,7,5,6,7,1,1,1,9,6,8,0,8,3,3,6,1,0,8,2,9,9,3,9,0,8,9, %U A019837 9,7,9,2,1,7,4,1,5,9,3,2,2,9,9,4,1,4,7,7,2,7,9,8,0,6,9,6,5,1,3 %N A019837 Decimal expansion of sine of 28 degrees. %C A019837 An algebraic number of degree 24 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017 %H A019837 Ivan Panchenko, <a href="/A019837/b019837.txt">Table of n, a(n) for n = 0..1000</a> %H A019837 <a href="/index/Al#algebraic_24">Index entries for algebraic numbers, degree 24</a> %F A019837 Equals 2*A019823*A019885. - _R. J. Mathar_, Jan 17 2021 %e A019837 0.469471562... %t A019837 RealDigits[Sin[28 Degree],10,120][[1]] (* _Harvey P. Dale_, Apr 19 2023 *) %o A019837 (PARI) sin(7*Pi/45) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019837 nonn,cons %O A019837 0,1 %A A019837 _N. J. A. Sloane_