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 A198541 #8 Apr 23 2025 12:41:12
%S A198541 5,1,0,7,2,7,5,7,3,3,8,5,5,1,7,3,1,2,0,7,9,4,0,8,2,9,0,2,7,2,0,5,8,5,
%T A198541 4,4,6,0,7,9,0,7,3,1,7,7,8,9,3,9,8,9,1,1,9,3,5,6,3,5,4,7,0,3,7,3,3,4,
%U A198541 5,5,7,6,3,8,0,4,8,5,6,5,0,9,7,9,7,1,3,9,6,4,3,5,9,8,9,0,3,5,5
%N A198541 Decimal expansion of x<0 having 4*x^2+3x=sin(x).
%C A198541 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198541 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198541 -0.510727573385517312079408290272058544...
%t A198541 a = 4; b = 3; c = 1;
%t A198541 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198541 Plot[{f[x], g[x]}, {x, -1, .2}]
%t A198541 r = x /. FindRoot[f[x] == g[x], {x, -.51, -.5}, WorkingPrecision -> 110]
%t A198541 RealDigits[r] (* A198541 *)
%Y A198541 Cf. A198414.
%K A198541 nonn,cons
%O A198541 0,1
%A A198541 _Clark Kimberling_, Oct 26 2011