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 A198872 #8 Feb 07 2025 16:44:05
%S A198872 1,1,0,6,3,3,2,5,5,5,0,2,9,9,3,5,9,1,5,2,5,4,7,5,6,0,9,5,7,2,9,5,1,6,
%T A198872 7,5,2,6,3,5,2,8,9,3,9,5,4,3,9,2,0,9,3,7,7,3,2,6,2,8,5,3,7,8,7,8,6,7,
%U A198872 5,0,5,3,0,5,6,8,9,7,0,9,1,5,8,1,2,2,9,1,0,0,6,7,1,1,0,5,3,5,5
%N A198872 Decimal expansion of x>0 satisfying 2*x^2-cos(x)=2.
%C A198872 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198872 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198872 x=1.1063325550299359152547560957295167526352...
%t A198872 a = 2; b = -1; c = 2;
%t A198872 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198872 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198872 r = x /. FindRoot[f[x] == g[x], {x, 1, 1.1}, WorkingPrecision -> 110]
%t A198872 RealDigits[r] (* A198872 *)
%Y A198872 Cf. A198755.
%K A198872 nonn,cons
%O A198872 1,4
%A A198872 _Clark Kimberling_, Oct 31 2011