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 A198348 #6 Feb 07 2025 16:44:05
%S A198348 7,4,3,1,4,1,8,4,7,6,1,2,8,7,2,4,2,2,0,8,0,4,3,0,6,9,5,5,5,9,9,6,8,2,
%T A198348 9,7,9,0,5,0,5,0,9,0,0,3,0,3,1,8,4,0,3,0,2,9,8,3,8,9,8,5,6,8,4,4,3,7,
%U A198348 3,5,6,1,1,5,8,9,4,2,2,8,2,7,6,9,8,9,5,8,8,9,8,6,2,0,3,5,5,5,9
%N A198348 Decimal expansion of x>0 having 4*x^2=3*cos(x).
%C A198348 See A197737 for a guide to related sequences. The Mathematica program includes a graph.
%e A198348 x=0.7431418476128724220804306955599...
%t A198348 a = 4; b = 0; c = 3;
%t A198348 f[x_] := a*x^2 + b*x; g[x_] := c*Cos[x]
%t A198348 Plot[{f[x], g[x]}, {x, -1, 1}]
%t A198348 r = x /. FindRoot[f[x] == g[x], {x, .74, .75}, WorkingPrecision -> 110]
%t A198348 RealDigits[r] (* A198348 *)
%Y A198348 Cf. A197737.
%K A198348 nonn,cons
%O A198348 0,1
%A A198348 _Clark Kimberling_, Oct 23 2011