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 A200413 #7 Mar 25 2022 18:50:07
%S A200413 1,4,9,0,1,4,5,8,2,7,9,1,2,3,2,0,4,6,1,4,3,7,5,7,0,2,7,8,4,7,3,0,8,6,
%T A200413 6,9,0,7,2,1,1,5,5,3,5,8,2,0,1,8,5,1,2,2,9,6,1,8,7,3,7,8,1,5,9,3,8,9,
%U A200413 7,4,1,9,6,3,4,0,7,9,3,3,4,9,9,4,5,0,7,3,7,4,2,2,8,0,7,3,7,4,7
%N A200413 Decimal expansion of least x > 0 satisfying 4*x^2+x+2 = tan(x).
%C A200413 See A200338 for a guide to related sequences. The Mathematica program includes a graph.
%e A200413 x = 1.490145827912320461437570278473086690721155358201851...
%t A200413 a = 4; b = 1; c = 2;
%t A200413 f[x_] := a*x^2 + b*x + c; g[x_] := Tan[x]
%t A200413 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200413 r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
%t A200413 RealDigits[r] (* A200413 *)
%Y A200413 Cf. A200338.
%K A200413 nonn,cons
%O A200413 1,2
%A A200413 _Clark Kimberling_, Nov 18 2011