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 A019897 #19 Aug 21 2023 11:49:08 %S A019897 9,9,9,3,9,0,8,2,7,0,1,9,0,9,5,7,3,0,0,0,6,2,4,3,4,4,0,0,4,3,9,2,9,9, %T A019897 6,4,4,9,5,2,3,6,3,0,6,6,6,9,9,9,6,7,7,3,1,0,3,9,0,0,4,0,8,0,1,0,9,4, %U A019897 8,6,1,8,9,1,8,3,3,2,6,5,2,5,4,9,5,0,4,5,3,4,4,6,4,2,2,3,6,4,4 %N A019897 Decimal expansion of sine of 88 degrees. %C A019897 Equals sin(22*Pi/45). - _Wesley Ivan Hurt_, Sep 01 2014 %C A019897 An algebraic number of degree 24 and denominator 2. - _Charles R Greathouse IV_, Aug 27 2017 %H A019897 Ivan Panchenko, <a href="/A019897/b019897.txt">Table of n, a(n) for n = 0..1000</a> %H A019897 <a href="/index/Al#algebraic_24">Index entries for algebraic numbers, degree 24</a> %F A019897 Equals 2*A019853*A019855. - _R. J. Mathar_, Jan 17 2021 %e A019897 0.9993908270190957300062434400439299644952363066699967731039004... %p A019897 Digits:=100: evalf(sin(22*Pi/45)); # _Wesley Ivan Hurt_, Sep 01 2014 %t A019897 RealDigits[Sin[22 Pi/45], 10, 100, -1][[1]] (* _Wesley Ivan Hurt_, Sep 01 2014 *) %o A019897 (PARI) cos(Pi/90) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019897 nonn,cons %O A019897 0,1 %A A019897 _N. J. A. Sloane_