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 A019901 #19 Jul 08 2025 07:43:12 %S A019901 0,5,2,4,0,7,7,7,9,2,8,3,0,4,1,2,0,4,0,3,8,8,0,5,8,2,4,4,7,3,9,8,4,3, %T A019901 7,4,9,5,3,4,2,4,9,2,7,8,0,9,9,4,7,3,8,4,4,7,3,4,4,4,9,1,5,3,5,3,0,3, %U A019901 6,1,6,0,8,9,3,7,3,8,0,8,0,4,5,2,6,2,7,7,9,3,2,1,8,4,0,4,7,0,5,7 %N A019901 Decimal expansion of tangent of 3 degrees. %C A019901 This sequence is also decimal expansion of cotangent of 87 degrees. - _Mohammad K. Azarian_, Jun 29 2013 %C A019901 An algebraic integer of degree 8. - _Charles R Greathouse IV_, Aug 27 2017 %H A019901 Ivan Panchenko, <a href="/A019901/b019901.txt">Table of n, a(n) for n = 0..1000</a> %H A019901 Wikipedia, <a href="http://en.wikipedia.org/wiki/Exact_trigonometric_constants">Exact trigonometric constants</a> %H A019901 <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a> %e A019901 0.0524077... %o A019901 (PARI) tan(Pi/60) \\ _Charles R Greathouse IV_, Aug 27 2017 %K A019901 nonn,cons %O A019901 0,2 %A A019901 _N. J. A. Sloane_ %E A019901 Zero added in front by _R. J. Mathar_, Feb 05 2009