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 A198826 #11 Feb 07 2025 16:44:05
%S A198826 1,3,2,0,3,8,3,3,5,6,9,4,3,9,6,2,6,4,7,4,8,1,6,3,5,3,0,2,1,7,6,8,2,9,
%T A198826 4,9,6,5,5,4,8,5,7,3,9,0,8,2,4,4,3,1,6,5,9,7,8,9,5,1,4,2,1,3,0,8,9,1,
%U A198826 6,2,1,8,1,6,1,2,9,7,6,8,4,3,9,1,4,2,0,6,4,2,3,9,2,7,0,0,7,9,8
%N A198826 Decimal expansion of x>0 satisfying x^2-3*cos(x)=1.
%C A198826 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198826 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198826 1.32038335694396264748163530217682949655...
%t A198826 a = 1; b = -3; c = 1;
%t A198826 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198826 Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]
%t A198826 r = x /. FindRoot[f[x] == g[x], {x, 1.3, 1.33}, WorkingPrecision -> 110]
%t A198826 RealDigits[r] (* A198826 *)
%Y A198826 Cf. A198755.
%K A198826 nonn,cons
%O A198826 1,2
%A A198826 _Clark Kimberling_, Oct 30 2011