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 A200382 #7 Feb 07 2025 16:44:06
%S A200382 1,4,8,2,7,4,8,3,4,0,4,1,3,3,0,7,1,4,3,2,2,9,5,6,8,8,1,2,8,3,3,3,9,6,
%T A200382 7,9,2,0,7,9,3,2,5,6,8,4,4,8,1,8,3,8,9,8,2,1,7,7,2,5,0,5,2,7,9,4,9,5,
%U A200382 8,9,2,2,9,6,4,6,9,1,8,0,6,3,0,9,1,1,5,0,0,1,4,0,8,9,7,7,6,1,6
%N A200382 Decimal expansion of least x>0 satisfying 2*x^2+4x+1=tan(x).
%C A200382 See A200338 for a guide to related sequences. The Mathematica program includes a graph.
%e A200382 x=1.4827483404133071432295688128333967920793256844...
%t A200382 a = 2; b = 4; c = 1;
%t A200382 f[x_] := a*x^2 + b*x + c; g[x_] := Tan[x]
%t A200382 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200382 r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
%t A200382 RealDigits[r] (* A200382 *)
%Y A200382 Cf. A200338.
%K A200382 nonn,cons
%O A200382 1,2
%A A200382 _Clark Kimberling_, Nov 17 2011