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 A019954 #15 Sep 08 2022 08:44:44 %S A019954 1,4,8,2,5,6,0,9,6,8,5,1,2,7,4,0,2,5,4,7,8,7,1,5,7,1,4,9,1,5,4,4,3,0, %T A019954 0,3,0,4,7,9,8,4,6,2,3,1,4,6,5,8,4,7,0,0,4,9,8,4,7,0,3,7,3,8,8,0,6,7, %U A019954 8,6,8,7,6,6,1,3,9,6,5,2,7,8,7,5,7,3,8,0,1,9,1,1,3,8,2,0,8,0,6 %N A019954 Decimal expansion of tangent of 56 degrees. %C A019954 Also the decimal expansion of cotangent of 34 degrees. - _Ivan Panchenko_, Sep 01 2014 %H A019954 Ivan Panchenko, <a href="/A019954/b019954.txt">Table of n, a(n) for n = 1..1000</a> %e A019954 1.4825609685127402547871571491544300304798462314658470049847... %t A019954 RealDigits[Tan[14*Pi/45], 10, 100][[1]] (* _G. C. Greubel_, Nov 22 2018 *) %t A019954 RealDigits[Tan[56 Degree],10,120][[1]] (* _Harvey P. Dale_, Jan 18 2019 *) %o A019954 (PARI) default(realprecision, 100); tan(14*Pi/45) \\ _G. C. Greubel_, Nov 22 2018 %o A019954 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Tan(14*Pi(R)/45); // _G. C. Greubel_, Nov 22 2018 %o A019954 (Sage) numerical_approx(tan(14*pi/45), digits=100) # _G. C. Greubel_, Nov 22 2018 %Y A019954 Cf. A019865 (sine of 56 degrees). %K A019954 nonn,cons %O A019954 1,2 %A A019954 _N. J. A. Sloane_