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 A198608 #9 Apr 23 2025 12:49:24
%S A198608 1,0,9,3,9,2,2,7,3,9,9,0,5,4,9,9,0,8,9,0,5,7,3,4,5,8,0,3,9,5,2,1,9,6,
%T A198608 2,2,7,6,0,4,6,8,8,2,5,0,1,9,1,3,7,3,8,4,3,9,4,4,4,9,8,2,6,5,8,9,3,0,
%U A198608 7,8,4,6,6,1,5,8,1,2,8,4,6,9,0,0,1,9,6,6,6,2,2,2,5,3,3,6,8,7,9
%N A198608 Decimal expansion of -x where x<0 satisfies 2*x^2+3x=sin(x).
%C A198608 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198608 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198608 -1.0939227399054990890573458039521962276046...
%t A198608 a = 2; b = 3; c = 1;
%t A198608 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198608 Plot[{f[x], g[x]}, {x, -2, .2}]
%t A198608 r = x /. FindRoot[f[x] == g[x], {x, -1.1, -1.0}, WorkingPrecision -> 110]
%t A198608 RealDigits[r](* A198608 *)
%Y A198608 Cf. A198414.
%K A198608 nonn,cons
%O A198608 1,3
%A A198608 _Clark Kimberling_, Oct 27 2011