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 A198616 #8 Apr 23 2025 12:50:38
%S A198616 6,9,2,6,9,1,1,2,3,3,5,8,2,4,7,4,1,6,8,9,9,8,6,2,8,1,1,2,6,0,4,6,1,8,
%T A198616 4,0,8,5,5,3,3,2,9,8,7,2,6,7,2,0,4,3,6,7,0,3,0,8,2,1,3,3,0,0,6,5,0,5,
%U A198616 7,7,2,7,6,0,4,1,8,2,3,6,3,2,6,3,8,5,1,5,5,3,2,6,4,4,2,4,8,4,6
%N A198616 Decimal expansion of x<0 satisfying 3*x^2+3x=sin(x).
%C A198616 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198616 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198616 -0.69269112335824741689986281126046184085...
%t A198616 a = 3; b = 3; c = 1;
%t A198616 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198616 Plot[{f[x], g[x]}, {x, -1, .1}]
%t A198616 r = x /. FindRoot[f[x] == g[x], {x, -.7, -.69}, WorkingPrecision -> 110]
%t A198616 RealDigits[r](* A198616 *)
%Y A198616 Cf. A198414.
%K A198616 nonn,cons
%O A198616 0,1
%A A198616 _Clark Kimberling_, Oct 28 2011