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 A019985 #27 Jul 08 2025 07:47:18 %S A019985 1,9,0,8,1,1,3,6,6,8,7,7,2,8,2,1,1,0,6,3,4,0,6,7,4,8,7,3,4,3,6,5,3,4, %T A019985 9,3,0,8,2,5,0,9,6,1,2,1,8,1,1,1,2,6,5,8,3,9,0,9,5,9,7,4,6,9,8,2,9,2, %U A019985 6,5,7,5,6,0,8,8,8,0,7,3,0,6,8,9,9,9,7,1,2,4,1,7,5,6,6,2,8,0,3 %N A019985 Decimal expansion of tangent of 87 degrees. %C A019985 Also the decimal expansion of cotangent of 3 degrees. - _Mohammad K. Azarian_, Jun 29 2013 %C A019985 An algebraic integer of degree 8. - _Charles R Greathouse IV_, Aug 27 2017 %H A019985 Ivan Panchenko, <a href="/A019985/b019985.txt">Table of n, a(n) for n = 2..1000</a> %H A019985 Wikipedia, <a href="http://en.wikipedia.org/wiki/Exact_trigonometric_constants">Exact trigonometric constants</a> %H A019985 <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a> %t A019985 RealDigits[Tan[87 Degree],10,120][[1]] (* _Harvey P. Dale_, Sep 08 2015 *) %o A019985 (PARI) tan(87*Pi/180) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019985 nonn,cons %O A019985 2,2 %A A019985 _N. J. A. Sloane_