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 A019969 #20 Sep 08 2022 08:44:44 %S A019969 2,9,0,4,2,1,0,8,7,7,6,7,5,8,2,2,8,0,2,5,7,9,3,2,5,5,3,4,5,2,7,0,9,1, %T A019969 2,5,4,0,3,1,2,6,1,9,2,1,8,4,6,2,2,1,6,6,8,3,6,3,0,2,4,7,1,1,3,9,3,7, %U A019969 3,9,8,9,5,2,7,7,3,0,3,3,9,8,5,0,1,1,1,4,3,0,9,6,7,6,8,8,3,9,6 %N A019969 Decimal expansion of tangent of 71 degrees. %C A019969 Also the decimal expansion of cotangent of 19 degrees. - _Ivan Panchenko_, Sep 01 2014 %H A019969 Ivan Panchenko, <a href="/A019969/b019969.txt">Table of n, a(n) for n = 1..1000</a> %e A019969 2.904210877675822802579325534527091254031261921846221668363... %t A019969 RealDigits[Tan[71 Degree],10,120][[1]] (* _Harvey P. Dale_, Apr 07 2014 *) %o A019969 (PARI) default(realprecision, 100); tan(71*Pi/180) \\ _G. C. Greubel_, Nov 21 2018 %o A019969 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(71*Pi(R)/180); // _G. C. Greubel_, Nov 21 2018 %o A019969 (Sage) numerical_approx(tan(71*pi/180), digits=100) # _G. C. Greubel_, Nov 21 2018 %Y A019969 Cf. A019880 (sine of 71 degrees). %K A019969 nonn,cons %O A019969 1,1 %A A019969 _N. J. A. Sloane_