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 A019910 #25 Aug 31 2025 12:25:05 %S A019910 2,1,2,5,5,6,5,6,1,6,7,0,0,2,2,1,2,5,2,5,9,5,9,1,6,6,0,5,7,0,0,8,1,9, %T A019910 5,7,4,1,8,5,3,4,5,4,5,7,4,8,6,9,2,0,0,9,3,9,5,4,4,4,9,5,1,9,5,2,3,5, %U A019910 0,4,2,2,9,1,5,6,8,9,7,1,2,2,6,5,6,4,5,0,1,4,1,9,7,1,9,3,5,2,4 %N A019910 Decimal expansion of tangent of 12 degrees. %C A019910 Also the decimal expansion of cotangent of 78 degrees. - _Mohammad K. Azarian_, Jun 30 2013 %H A019910 Ivan Panchenko, <a href="/A019910/b019910.txt">Table of n, a(n) for n = 0..1000</a> %H A019910 Wikipedia, <a href="http://en.wikipedia.org/wiki/Exact_trigonometric_constants">Exact trigonometric constants</a> %H A019910 <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a> %F A019910 tan(Pi/15) = A019821/A019887. - _R. J. Mathar_, Aug 31 2025 %F A019910 Smallest positive of the 8 real-valued roots of x^8-35*x^6+130*x^4-28*x^2+1=0. - _R. J. Mathar_, Aug 31 2025 %t A019910 RealDigits[Tan[12 Degree],10,120][[1]] (* _Harvey P. Dale_, May 10 2012 *) %K A019910 nonn,cons,changed %O A019910 0,1 %A A019910 _N. J. A. Sloane_