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 A201336 #10 Jan 30 2025 15:57:57
%S A201336 4,6,8,5,4,0,5,4,7,6,8,9,1,2,8,6,5,9,1,2,2,9,2,7,7,8,5,7,6,1,7,4,3,1,
%T A201336 3,1,1,4,6,0,2,2,6,7,1,6,1,4,6,6,3,0,2,9,6,7,0,1,5,9,2,9,0,6,2,5,9,5,
%U A201336 2,4,4,9,6,2,6,5,8,2,1,2,1,6,7,2,2,9,9,2,7,8,0,1,2,3,0,1,7,5,7
%N A201336 Decimal expansion of x satisfying 9*x^2 = cot(x) and 0 < x < Pi.
%C A201336 See A201280 for a guide to related sequences. The Mathematica program includes a graph.
%H A201336 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A201336 0.4685405476891286591229277857617431311460...
%t A201336 a = 9; c = 0;
%t A201336 f[x_] := a*x^2 + c; g[x_] := Cot[x]
%t A201336 Plot[{f[x], g[x]}, {x, 0, Pi/2}, {AxesOrigin -> {0, 0}}]
%t A201336 r = x /. FindRoot[f[x] == g[x], {x, .4, .5}, WorkingPrecision -> 110]
%t A201336 RealDigits[r] (* A201336 *)
%Y A201336 Cf. A201280.
%K A201336 nonn,cons
%O A201336 0,1
%A A201336 _Clark Kimberling_, Nov 30 2011