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 A199779 #8 Feb 08 2025 22:32:40
%S A199779 1,2,4,3,5,7,8,5,2,1,1,0,7,1,3,5,0,4,6,9,9,4,5,7,6,2,0,0,7,1,7,9,5,5,
%T A199779 7,8,8,1,3,2,0,0,1,5,4,2,2,5,8,5,7,3,9,1,4,2,2,7,9,4,5,7,5,9,2,9,6,4,
%U A199779 5,1,7,7,8,4,0,2,5,7,6,5,5,7,3,2,8,6,6,8,3,6,1,8,4,8,1,4,1,9,4
%N A199779 Decimal expansion of x>0 satisfying 2*x^2-3*x*cos(x)=2*sin(x).
%C A199779 See A199597 for a guide to related sequences. The Mathematica program includes a graph.
%H A199779 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A199779 1.243578521107135046994576200717955788132001...
%t A199779 a = 2; b = -3; c = 2;
%t A199779 f[x_] := a*x^2 + b*x*Cos[x]; g[x_] := c*Sin[x]
%t A199779 Plot[{f[x], g[x]}, {x, -1, 2}, {AxesOrigin -> {0, 0}}]
%t A199779 r = x /. FindRoot[f[x] == g[x], {x, 1.24, 1.25}, WorkingPrecision -> 110]
%t A199779 RealDigits[r] (* A199779 *)
%Y A199779 Cf. A199597.
%K A199779 nonn,cons
%O A199779 1,2
%A A199779 _Clark Kimberling_, Nov 10 2011