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 A198998 #8 Feb 07 2025 19:45:43
%S A198998 1,0,5,7,4,9,3,6,1,7,2,6,8,8,4,0,3,6,5,4,9,7,9,5,2,6,8,3,6,5,8,5,6,1,
%T A198998 5,0,5,1,5,1,1,3,0,6,7,1,6,3,0,5,2,1,0,9,2,9,3,1,8,6,1,8,5,3,1,3,7,0,
%U A198998 6,0,5,2,6,4,5,7,5,2,6,6,7,2,9,8,1,4,2,7,7,0,6,8,7,0,3,8,1,7,6
%N A198998 Decimal expansion of x>0 satisfying 4*x^2-3*cos(x)=3.
%C A198998 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198998 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198998 1.057493617268840365497952683658561505151130...
%t A198998 a = 4; b = -3; c = 3;
%t A198998 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198998 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198998 r = x /. FindRoot[f[x] == g[x], {x, 1.05, 1.06}, WorkingPrecision -> 110]
%t A198998 RealDigits[r] (* A198998 *)
%Y A198998 Cf. A198755.
%K A198998 nonn,cons
%O A198998 1,3
%A A198998 _Clark Kimberling_, Nov 01 2011