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 A198504 #8 Apr 23 2025 12:36:53
%S A198504 6,9,1,6,2,1,3,6,4,6,2,5,5,8,4,5,3,2,0,0,7,1,1,6,4,0,3,1,3,7,2,6,4,0,
%T A198504 7,3,7,9,1,5,6,4,1,1,5,9,4,9,1,0,0,0,9,7,2,7,7,7,7,6,3,5,3,5,0,5,0,2,
%U A198504 7,9,8,7,5,4,7,0,2,8,1,8,5,5,3,9,2,9,9,5,4,8,3,1,2,7,6,6,9,2,0
%N A198504 Decimal expansion of x>0 having 4*x^2=3*sin(x).
%C A198504 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198504 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198504 0.691621364625584532007116403137264073...
%t A198504 a = 4; b = 0; c = 3;
%t A198504 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198504 Plot[{f[x], g[x]}, {x, -.2, 1}]
%t A198504 r = x /. FindRoot[f[x] == g[x], {x, .69, .7}, WorkingPrecision -> 110]
%t A198504 RealDigits[r] (* A198504 *)
%Y A198504 Cf. A198414.
%K A198504 nonn,cons
%O A198504 0,1
%A A198504 _Clark Kimberling_, Oct 25 2011