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 A198489 #14 Apr 23 2025 12:30:58
%S A198489 3,8,3,3,5,6,1,0,0,7,1,6,8,5,7,4,4,2,3,4,0,1,4,9,4,5,3,0,5,7,9,9,0,1,
%T A198489 8,0,4,6,6,2,9,2,2,3,5,5,2,6,1,7,2,0,8,3,6,9,0,2,7,5,3,7,6,9,7,2,3,2,
%U A198489 0,7,1,8,8,8,5,5,0,9,3,0,8,5,0,4,1,7,2,0,8,1,7,7,7,4,1,0,2,6,4,8
%N A198489 Decimal expansion of x > 0 having x^2-4*x = sin(x).
%C A198489 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198489 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198489 3.83356100716857442340149453057990180466...
%t A198489 a = 1; b = -4; c = 1;
%t A198489 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198489 Plot[{f[x], g[x]}, {x, -.2, 4}]
%t A198489 r = x /. FindRoot[f[x] == g[x], {x, 3.83, 3.84}, WorkingPrecision -> 110]
%t A198489 RealDigits[r] (* A198489 *)
%Y A198489 Cf. A198414.
%K A198489 nonn,cons
%O A198489 1,1
%A A198489 _Clark Kimberling_, Oct 25 2011
%E A198489 a(91) onwards corrected by _Georg Fischer_, Aug 01 2021