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 A200631 #8 Feb 07 2025 16:44:07
%S A200631 1,5,0,5,6,7,9,7,3,4,4,8,8,3,8,7,0,0,6,2,2,6,5,5,8,5,8,7,6,7,7,6,1,2,
%T A200631 5,6,6,5,2,3,7,8,2,2,9,0,1,8,1,6,9,5,3,9,4,7,6,1,9,6,2,9,6,8,2,9,7,6,
%U A200631 1,9,1,2,0,1,7,9,3,4,5,1,0,7,5,9,4,8,9,5,5,5,7,3,1,6,6,6,7,3,7
%N A200631 Decimal expansion of least x>0 satisfying 5*x^2+4=tan(x).
%C A200631 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200631 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200631 x=1.5056797344883870062265585876776125665237822901...
%t A200631 a = 5; c = -4;
%t A200631 f[x_] := a*x^2 - c; g[x_] := Tan[x]
%t A200631 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200631 r = x /. FindRoot[f[x] == g[x], {x, 1.5, 1.51}, WorkingPrecision -> 110]
%t A200631 RealDigits[r] (* A200631 *)
%Y A200631 Cf. A200338.
%K A200631 nonn,cons
%O A200631 1,2
%A A200631 _Clark Kimberling_, Nov 20 2011