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 A198491 #8 Apr 23 2025 12:36:15
%S A198491 3,6,1,9,0,6,8,6,3,6,5,5,6,5,2,9,7,6,8,4,8,5,0,6,2,0,4,1,7,6,8,8,5,0,
%T A198491 4,6,3,2,1,7,7,2,9,7,7,6,3,5,8,8,0,1,2,4,5,1,8,8,0,5,1,1,2,4,6,9,6,8,
%U A198491 5,7,8,5,6,3,3,7,9,4,6,4,8,8,6,4,0,2,3,5,5,6,8,8,7,2,8,9,5,1,2
%N A198491 Decimal expansion of x>0 having x^2-4x=3*sin(x).
%C A198491 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198491 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198491 3.619068636556529768485062041768850463217...
%t A198491 a = 1; b = -4; c = 3;
%t A198491 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198491 Plot[{f[x], g[x]}, {x, -.2, 4}]
%t A198491 r = x /. FindRoot[f[x] == g[x], {x, 3.61, 3.62}, WorkingPrecision -> 110]
%t A198491 RealDigits[r] (* A198491 *)
%Y A198491 Cf. A198414.
%K A198491 nonn,cons
%O A198491 1,1
%A A198491 _Clark Kimberling_, Oct 25 2011