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 A200643 #8 Feb 07 2025 16:44:07
%S A200643 1,5,0,8,0,6,3,8,7,5,0,8,5,6,5,4,9,9,0,0,6,8,7,1,0,4,0,4,9,4,2,1,0,1,
%T A200643 5,5,9,2,6,1,7,9,8,8,8,2,3,7,2,4,0,6,5,2,3,2,8,7,9,4,8,7,4,1,5,0,7,5,
%U A200643 0,7,9,6,8,6,8,2,1,4,7,9,7,9,8,6,3,5,9,0,5,9,2,9,5,6,1,7,1,8,9
%N A200643 Decimal expansion of least x>0 satisfying 7*x^2=tan(x).
%C A200643 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200643 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200643 1.50806387508565499006871040494210155926179888...
%t A200643 a = 7; c = 0;
%t A200643 f[x_] := a*x^2 - c; g[x_] := Tan[x]
%t A200643 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200643 r = x /. FindRoot[f[x] == g[x], {x, 1.5, 1.51}, WorkingPrecision -> 110]
%t A200643 RealDigits[r] (* A200643 *)
%Y A200643 Cf. A200338.
%K A200643 nonn,cons
%O A200643 1,2
%A A200643 _Clark Kimberling_, Nov 20 2011