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 A198606 #8 Apr 23 2025 12:49:21
%S A198606 1,0,5,8,8,9,1,2,6,8,5,3,1,9,7,4,4,7,9,4,7,0,3,8,8,9,5,8,4,5,1,4,8,1,
%T A198606 1,2,1,2,1,2,2,6,8,9,4,6,7,7,1,7,6,8,8,9,0,6,7,0,8,8,6,5,7,5,0,6,4,4,
%U A198606 8,4,9,4,2,5,4,0,5,9,7,3,6,6,8,0,2,8,0,5,2,5,2,4,1,6,1,7,4,9,3
%N A198606 Decimal expansion of x<0 satisfying 3*x^2+4x=sin(x).
%C A198606 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198606 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198606 -1.0588912685319744794703889584514811212122...
%t A198606 a = 3; b = 4; c = 1;
%t A198606 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198606 Plot[{f[x], g[x]}, {x, -1.4, .1}]
%t A198606 r = x /. FindRoot[f[x] == g[x], {x, -1.1, -1}, WorkingPrecision -> 110]
%t A198606 RealDigits[r](* A198606 *)
%Y A198606 Cf. A198414.
%K A198606 nonn,cons
%O A198606 1,3
%A A198606 _Clark Kimberling_, Oct 28 2011