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 A019848 #29 Aug 21 2023 11:51:29 %S A019848 6,2,9,3,2,0,3,9,1,0,4,9,8,3,7,4,5,2,7,0,5,9,0,2,4,5,8,2,7,9,9,7,0,4, %T A019848 2,6,5,6,6,8,6,2,4,1,2,1,2,9,8,6,6,6,3,9,4,6,0,3,2,8,0,2,5,7,8,0,7,5, %U A019848 3,0,0,9,9,8,7,2,1,3,6,3,6,7,2,4,6,4,6,9,4,6,6,0,6,8,9,9,9,8,9 %N A019848 Decimal expansion of sine of 39 degrees. %C A019848 This sequence is also decimal expansion of cosine of 51 degrees. - _Mohammad K. Azarian_, Jun 29 2013 %C A019848 An algebraic number of degree 16 and denominator 2. - _Charles R Greathouse IV_, Nov 05 2017 %H A019848 Ivan Panchenko, <a href="/A019848/b019848.txt">Table of n, a(n) for n = 0..1000</a> %H A019848 Wikipedia, <a href="https://en.wikipedia.org/wiki/Trigonometric_constants_expressed_in_real_radicals">Trigonometric constants expressed in real radicals</a> %H A019848 <a href="/index/Al#algebraic_16">Index entries for algebraic numbers, degree 16</a> %F A019848 Equals A019835*A019886 + A019822*A019873 = A019845*A019896 + A019812*A019863. - _R. J. Mathar_, Jan 27 2021 %t A019848 RealDigits[Sin[39 Degree],10,120][[1]] (* _Harvey P. Dale_, Oct 02 2015 *) %o A019848 (PARI) sin(13/60*Pi) \\ _Charles R Greathouse IV_, Nov 05 2017 %Y A019848 Cf. A019812, A019822, A019835, A019845, A019886, A019873, A019896, A019863. %K A019848 nonn,cons %O A019848 0,1 %A A019848 _N. J. A. Sloane_