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 A200700 #8 Feb 07 2025 16:44:07
%S A200700 3,5,4,8,2,2,8,6,5,9,8,5,9,9,0,7,5,7,7,7,6,5,2,8,8,7,1,9,5,0,1,3,6,8,
%T A200700 4,3,4,1,5,2,4,2,4,1,9,2,4,5,4,3,8,1,1,1,8,2,2,3,5,1,3,5,5,8,6,8,2,5,
%U A200700 8,8,9,5,3,2,5,9,3,4,8,8,7,1,6,3,5,5,1,4,4,0,2,0,7,1,0,3,0,0,2
%N A200700 Decimal expansion of least x>0 satisfying 1-5*x^2=tan(x).
%C A200700 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200700 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200700 0.3548228659859907577765288719501368434152424...
%t A200700 a = -5; c = 1;
%t A200700 f[x_] := a*x^2 + c; g[x_] := Tan[x]
%t A200700 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200700 r = x /. FindRoot[f[x] == g[x], {x, .3, .4}, WorkingPrecision -> 110]
%t A200700 RealDigits[r] (* A200700 *)
%Y A200700 Cf. A200338.
%K A200700 nonn,cons
%O A200700 0,1
%A A200700 _Clark Kimberling_, Nov 21 2011