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 A019843 #24 Aug 21 2023 11:47:52 %S A019843 5,5,9,1,9,2,9,0,3,4,7,0,7,4,6,8,3,0,1,6,0,4,2,8,1,3,9,9,8,5,9,8,9,2, %T A019843 8,7,3,0,6,6,2,1,9,4,0,3,9,5,6,6,9,4,2,1,7,9,4,8,6,9,3,5,2,2,4,5,4,0, %U A019843 2,8,4,7,3,9,7,6,4,2,8,3,9,1,7,7,5,0,8,8,0,5,3,1,0,7,2,6,3,9,6 %N A019843 Decimal expansion of sine of 34 degrees. %C A019843 This sequence is also decimal expansion of cosine of 56 degrees. - _Mohammad K. Azarian_, Jun 29 2013 %C A019843 An algebraic number of degree 12 and denominator 2. - _Charles R Greathouse IV_, Nov 05 2017 %H A019843 Ivan Panchenko, <a href="/A019843/b019843.txt">Table of n, a(n) for n = 0..1000</a> %H A019843 <a href="/index/Al#algebraic_12">Index entries for algebraic numbers, degree 12</a> %F A019843 Equals 2*A019826*A019882. - _R. J. Mathar_, Jan 17 2021 %e A019843 0.55919290... %t A019843 RealDigits[Sin[34 Degree],10,120][[1]] (* _Harvey P. Dale_, Aug 03 2021 *) %o A019843 (PARI) sin(17/90*Pi) \\ _Charles R Greathouse IV_, Nov 05 2017 %K A019843 nonn,cons %O A019843 0,1 %A A019843 _N. J. A. Sloane_