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 A019959 #13 Sep 08 2022 08:44:44 %S A019959 1,8,0,4,0,4,7,7,5,5,2,7,1,4,2,3,9,3,7,3,8,1,7,8,4,7,4,8,2,3,7,0,0,7, %T A019959 7,2,4,3,1,5,6,5,7,0,5,5,6,9,8,5,2,1,7,6,9,4,5,6,6,7,7,8,6,4,5,8,1,4, %U A019959 4,5,2,9,9,9,9,3,2,2,4,9,4,0,1,6,4,1,3,4,0,9,2,7,7,8,5,8,8,5,1 %N A019959 Decimal expansion of tangent of 61 degrees. %C A019959 Also the decimal expansion of cotangent of 29 degrees. - _Ivan Panchenko_, Sep 01 2014 %H A019959 Ivan Panchenko, <a href="/A019959/b019959.txt">Table of n, a(n) for n = 1..1000</a> %e A019959 1.80404775527142393738178474823700772431565705569852176945667786458... %t A019959 RealDigits[Tan[61 Degree],10,120][[1]] (* _Harvey P. Dale_, Mar 29 2016 *) %t A019959 RealDigits[Tan[61*Pi/180], 10, 100][[1]] (* _G. C. Greubel_, Nov 22 2018 *) %o A019959 (PARI) default(realprecision, 100); tan(61*Pi/180) \\ _G. C. Greubel_, Nov 22 2018 %o A019959 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(61*Pi(R)/180); // _G. C. Greubel_, Nov 22 2018 %o A019959 (Sage) numerical_approx(tan(61*pi/180), digits=100) # _G. C. Greubel_, Nov 22 2018 %Y A019959 Cf. A019870 (sine of 61 degrees). %K A019959 nonn,cons %O A019959 1,2 %A A019959 _N. J. A. Sloane_