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 A200685 #8 Feb 07 2025 16:44:07
%S A200685 5,8,3,2,4,8,4,6,7,2,5,5,0,4,8,0,4,1,4,8,3,8,6,6,6,2,9,9,1,3,2,0,7,5,
%T A200685 4,0,7,3,0,4,3,4,9,7,8,7,7,2,0,5,6,0,0,6,0,3,4,8,2,7,1,1,4,9,4,2,3,2,
%U A200685 2,7,4,9,1,5,8,8,1,3,3,6,7,3,0,2,9,7,2,1,6,1,9,4,5,9,1,4,9,9,7
%N A200685 Decimal expansion of least x>0 satisfying 1-x^2=tan(x).
%C A200685 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200685 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200685 0.5832484672550480414838666299132075407...
%t A200685 a = -1; c = 1;
%t A200685 f[x_] := a*x^2 + c; g[x_] := Tan[x]
%t A200685 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200685 r = x /. FindRoot[f[x] == g[x], {x, .5, .6}, WorkingPrecision -> 110]
%t A200685 RealDigits[r](* A200685 *)
%Y A200685 Cf. A200338.
%K A200685 nonn,cons
%O A200685 0,1
%A A200685 _Clark Kimberling_, Nov 20 2011