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 A200642 #8 Feb 07 2025 16:44:07
%S A200642 1,4,9,9,4,5,5,6,9,7,1,2,8,7,3,0,9,7,4,2,7,9,9,3,6,4,0,4,3,1,7,2,1,6,
%T A200642 3,6,5,2,6,3,3,8,1,8,9,4,6,1,2,9,8,9,5,2,4,8,6,0,5,6,6,9,2,5,8,1,6,9,
%U A200642 7,5,3,9,3,4,7,5,7,0,1,9,7,8,8,1,3,5,4,5,0,3,1,3,3,4,4,2,7,6,8
%N A200642 Decimal expansion of least x>0 satisfying 4*x^2+5=tan(x).
%C A200642 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200642 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200642 1.4994556971287309742799364043172163652633818946...
%t A200642 a = 4; c = -5;
%t A200642 f[x_] := a*x^2 - c; g[x_] := Tan[x]
%t A200642 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200642 r = x /. FindRoot[f[x] == g[x], {x, 1.49, 1.5}, WorkingPrecision -> 110]
%t A200642 RealDigits[r] (* A200642 *)
%Y A200642 Cf. A200338.
%K A200642 nonn,cons
%O A200642 1,2
%A A200642 _Clark Kimberling_, Nov 20 2011