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 A200356 #6 Feb 07 2025 16:44:06
%S A200356 1,4,8,1,0,9,3,5,7,0,0,9,6,8,2,8,2,3,1,2,1,6,9,9,4,9,3,4,8,4,7,0,5,9,
%T A200356 9,5,0,9,7,3,0,5,5,4,7,5,7,9,9,9,8,9,6,9,9,8,1,6,4,2,8,2,3,0,3,0,5,5,
%U A200356 8,5,9,0,8,6,1,2,0,6,4,7,4,3,5,7,5,0,0,0,1,3,1,0,7,8,0,2,0,4,0
%N A200356 Decimal expansion of least x>0 satisfying x^2+4x+3=tan(x).
%C A200356 See A200338 for a guide to related sequences. The Mathematica program includes a graph.
%e A200356 x=1.4810935700968282312169949348470599509730...
%t A200356 a = 1; b = 4; c = 3;
%t A200356 f[x_] := a*x^2 + b*x + c; g[x_] := Tan[x]
%t A200356 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200356 r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
%t A200356 RealDigits[r] (* A200356 *)
%Y A200356 Cf. A200338.
%K A200356 nonn,cons
%O A200356 1,2
%A A200356 _Clark Kimberling_, Nov 17 2011