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 A200341 #9 Feb 07 2025 16:44:06
%S A200341 1,4,0,4,9,3,7,8,9,6,3,7,8,1,7,5,7,8,8,8,2,3,5,2,2,7,4,9,3,2,8,0,0,5,
%T A200341 3,1,7,4,3,4,4,8,8,0,0,9,1,6,4,0,2,9,4,5,7,1,5,9,2,0,3,6,7,4,6,3,7,8,
%U A200341 8,9,6,0,2,5,8,0,3,2,5,2,6,0,8,9,8,9,0,4,2,6,0,4,6,9,4,4,8,1,7,8,9
%N A200341 Decimal expansion of least x>0 satisfying x^2+4=tan(x).
%C A200341 See A200338 for a guide to related sequences. The Mathematica program includes a graph.
%e A200341 x=1.4049378963781757888235227493280053174...
%t A200341 a = 1; b = 0; c = 4;
%t A200341 f[x_] := a*x^2 + b*x + c; g[x_] := Tan[x]
%t A200341 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200341 r = x /. FindRoot[f[x] == g[x], {x, 1.3, 1.4}, WorkingPrecision -> 110]
%t A200341 RealDigits[r] (* A200341 *)
%Y A200341 Cf. A200338.
%K A200341 nonn,cons
%O A200341 1,2
%A A200341 _Clark Kimberling_, Nov 16 2011