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 A019963 #16 Sep 17 2023 18:48:30 %S A019963 2,1,4,4,5,0,6,9,2,0,5,0,9,5,5,8,6,1,6,3,5,6,2,6,0,7,9,1,0,4,5,9,2,2, %T A019963 1,8,0,6,8,5,9,3,1,5,7,4,2,7,6,0,6,8,9,8,4,2,9,9,1,3,6,5,2,6,7,0,4,2, %U A019963 5,5,0,3,9,4,9,8,9,7,5,5,8,0,0,7,4,7,4,0,2,7,1,4,8,3,5,3,0,5,3 %N A019963 Decimal expansion of tangent of 65 degrees. %H A019963 Ivan Panchenko, <a href="/A019963/b019963.txt">Table of n, a(n) for n = 1..1000</a> %e A019963 2.144506920509558616356260791045922180685931574276... %t A019963 RealDigits[Tan[65*Pi/180], 10, 100][[1]] (* _G. C. Greubel_, Nov 21 2018 *) %t A019963 RealDigits[Tan[65 Degree],10,120][[1]] (* _Harvey P. Dale_, Sep 17 2023 *) %o A019963 (PARI) default(realprecision, 100); tan(65*Pi/180) \\ _G. C. Greubel_, Nov 21 2018 %o A019963 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(65*Pi(R)/180); // _G. C. Greubel_, Nov 21 2018 %o A019963 (Sage) numerical_approx(tan(65*pi/180), digits=100) # _G. C. Greubel_, Nov 21 2018 %Y A019963 Cf. A019874 (sine of 65 degrees). %K A019963 nonn,cons %O A019963 1,1 %A A019963 _N. J. A. Sloane_