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 A200618 #13 Feb 07 2025 16:44:07
%S A200618 1,4,7,9,7,0,5,2,0,2,2,4,4,3,5,8,0,5,9,6,7,5,1,2,3,9,9,3,9,5,2,3,3,1,
%T A200618 8,5,2,9,5,9,7,1,4,2,1,5,4,9,5,0,2,7,0,7,2,5,0,2,7,0,3,7,3,0,9,6,1,2,
%U A200618 0,6,4,7,5,6,5,6,3,2,5,7,0,7,7,0,5,0,5,6,4,2,1,6,8,9,1,4,3,1,7
%N A200618 Decimal expansion of least x>0 satisfying 5*x^2=tan(x).
%C A200618 See A200614 for a guide to related sequences. The Mathematica program includes a graph.
%H A200618 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A200618 1.47970520224435805967512399395233185295971...
%t A200618 a = 5; c = 0;
%t A200618 f[x_] := a*x^2 - c; g[x_] := Tan[x]
%t A200618 Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A200618 r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
%t A200618 RealDigits[r] (* A200618 *)
%Y A200618 Cf. A200338.
%K A200618 nonn,cons
%O A200618 1,2
%A A200618 _Clark Kimberling_, Nov 20 2011