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 A198812 #8 Feb 07 2025 16:44:05
%S A198812 2,1,6,0,8,1,9,4,5,8,1,0,8,3,9,5,5,4,4,9,4,7,6,8,7,7,6,3,5,0,8,3,4,8,
%T A198812 3,3,5,9,8,2,3,6,0,1,7,6,0,5,1,8,3,5,5,9,7,2,1,1,6,1,4,5,3,0,2,5,2,0,
%U A198812 5,1,4,2,3,6,1,2,1,3,2,4,6,3,5,9,5,1,9,1,7,5,7,1,7,0,8,6,4,9,4
%N A198812 Decimal expansion of x>0 satisfying x^2+3*cos(x)=3.
%C A198812 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198812 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198812 x=2.160819458108395544947687763508348335982360176...
%t A198812 a = 1; b = 3; c = 3;
%t A198812 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198812 Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]
%t A198812 r = x /. FindRoot[f[x] == g[x], {x, 2.1, 2.2}, WorkingPrecision -> 110]
%t A198812 RealDigits[r] (* A198812 *)
%Y A198812 Cf. A198755.
%K A198812 nonn,cons
%O A198812 1,1
%A A198812 _Clark Kimberling_, Oct 30 2011