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 A198612 #10 Apr 23 2025 12:49:32
%S A198612 5,8,3,7,5,1,7,2,0,0,2,1,7,0,9,5,2,9,6,1,3,8,8,6,7,0,9,8,9,8,0,3,4,2,
%T A198612 3,0,9,0,5,3,3,4,0,5,3,1,9,8,2,9,5,6,1,4,4,6,8,3,3,3,3,1,3,5,4,6,3,9,
%U A198612 5,7,2,4,3,8,3,5,0,4,3,0,5,3,8,1,7,1,7,1,1,6,0,3,6,1,7,7,3,8,6
%N A198612 Decimal expansion of x < 0 satisfying 2*x^2+4*x = 3*sin(x).
%C A198612 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198612 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198612 -0.583751720021709529613886709898034230905334...
%t A198612 a = 2; b = 4; c = 3;
%t A198612 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198612 Plot[{f[x], g[x]}, {x, -1, .1}]
%t A198612 r = x /. FindRoot[f[x] == g[x], {x, -.6, .5}, WorkingPrecision -> 110]
%t A198612 RealDigits[r](* A198612 *)
%Y A198612 Cf. A198414.
%K A198612 nonn,cons
%O A198612 0,1
%A A198612 _Clark Kimberling_, Oct 28 2011
%E A198612 Offset corrected by _Georg Fischer_, Aug 01 2021