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 A200686 #8 Feb 07 2025 16:44:07
%S A200686 8,8,3,7,5,9,9,5,7,2,0,8,3,1,5,8,6,4,5,3,1,9,4,7,2,8,9,0,5,2,1,2,8,6,
%T A200686 2,8,6,9,7,1,6,7,9,7,9,1,6,7,2,7,5,9,2,1,3,3,0,0,1,1,6,2,5,7,1,4,5,2,
%U A200686 8,6,9,5,1,0,0,9,8,0,1,2,4,6,1,9,0,4,4,0,4,8,5,6,9,2,2,5,4,5,9
%N A200686 Decimal expansion of least x>0 satisfying 2-x^2=tan(x).
%C A200686 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200686 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200686 0.8837599572083158645319472890521286286971...
%t A200686 a = -1; c = 2;
%t A200686 f[x_] := a*x^2 + c; g[x_] := Tan[x]
%t A200686 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200686 r = x /. FindRoot[f[x] == g[x], {x, .8, .9}, WorkingPrecision -> 110]
%t A200686 RealDigits[r] (* A200686 *)
%Y A200686 Cf. A200338.
%K A200686 nonn,cons
%O A200686 0,1
%A A200686 _Clark Kimberling_, Nov 20 2011