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 A200688 #10 Feb 07 2025 16:44:07
%S A200688 1,1,9,8,7,8,3,7,4,3,1,5,4,6,7,2,3,3,0,7,6,6,9,4,2,2,1,1,4,5,5,5,5,3,
%T A200688 3,3,0,7,1,3,1,2,9,2,9,6,7,2,9,2,5,1,6,4,0,9,2,5,6,0,3,9,6,9,1,0,7,0,
%U A200688 7,3,1,1,2,4,5,3,0,9,6,1,1,9,0,8,4,2,0,1,4,4,8,3,2,8,9,4,1,6,4
%N A200688 Decimal expansion of least x>0 satisfying 4-x^2=tan(x).
%C A200688 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200688 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200688 1.19878374315467233076694221145555333...
%t A200688 a = -1; c = 4;
%t A200688 f[x_] := a*x^2 + c; g[x_] := Tan[x]
%t A200688 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200688 r = x /. FindRoot[f[x] == g[x], {x, 1.1, 1.2}, WorkingPrecision -> 110]
%t A200688 RealDigits[r] (* A200688 *)
%Y A200688 Cf. A200338.
%K A200688 nonn,cons
%O A200688 1,3
%A A200688 _Clark Kimberling_, Nov 21 2011