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 A198984 #8 Feb 07 2025 19:46:56
%S A198984 9,2,1,3,0,6,0,6,5,8,4,7,8,0,8,9,9,3,0,4,7,8,6,8,1,2,9,7,4,7,8,4,7,4,
%T A198984 8,2,7,5,7,1,7,9,8,0,8,3,1,1,4,4,1,6,7,1,7,5,9,2,4,4,0,0,0,7,1,8,1,7,
%U A198984 7,1,5,9,0,8,0,2,4,7,1,8,9,9,3,4,3,0,5,9,4,4,0,6,9,7,6,6,8,9,1
%N A198984 Decimal expansion of x>0 satisfying 4*x^2+cos(x)=4.
%C A198984 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198984 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198984 0.92130606584780899304786812974784748275717980831...
%t A198984 a = 4; b = 1; c = 4;
%t A198984 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198984 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198984 r = x /. FindRoot[f[x] == g[x], {x, .92, .93}, WorkingPrecision -> 110]
%t A198984 RealDigits[r] (* A198984 *)
%Y A198984 Cf. A198755.
%K A198984 nonn,cons
%O A198984 0,1
%A A198984 _Clark Kimberling_, Nov 01 2011