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 A200491 #6 Feb 07 2025 16:44:07
%S A200491 6,6,4,5,5,1,2,2,7,8,1,8,2,3,0,7,2,6,9,1,0,9,6,1,1,8,8,5,0,3,0,0,9,0,
%T A200491 4,0,4,0,4,2,2,4,6,0,6,8,4,7,8,8,6,3,6,4,3,0,0,1,0,8,4,6,3,0,9,1,5,4,
%U A200491 6,8,7,6,4,8,4,6,5,6,4,9,5,5,2,9,5,1,5,6,7,6,8,1,4,6,2,7,1,4,1
%N A200491 Decimal expansion of least x>0 satisfying x^2-4x+3=tan(x).
%C A200491 See A200338 for a guide to related sequences. The Mathematica program includes a graph.
%e A200491 x=0.66455122781823072691096118850300904040...
%t A200491 a = 1; b = -4; c = 3;
%t A200491 f[x_] := a*x^2 + b*x + c; g[x_] := Tan[x]
%t A200491 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200491 r = x /. FindRoot[f[x] == g[x], {x, .66, .67}, WorkingPrecision -> 110]
%t A200491 RealDigits[r] (* A200491 *)
%Y A200491 Cf. A200338.
%K A200491 nonn,cons
%O A200491 0,1
%A A200491 _Clark Kimberling_, Nov 18 2011