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 A198828 #8 Feb 07 2025 16:44:05
%S A198828 1,4,9,3,6,8,6,6,5,7,8,3,4,6,5,2,5,7,6,6,4,8,7,9,0,7,9,9,2,2,3,9,0,5,
%T A198828 7,1,6,1,4,1,1,1,4,9,5,3,7,3,6,5,3,4,1,8,5,3,3,1,3,6,2,5,2,8,8,7,8,6,
%U A198828 1,6,0,9,6,4,1,3,9,7,5,1,0,9,6,4,4,0,1,9,9,1,1,8,4,9,1,9,8,1,9
%N A198828 Decimal expansion of x>0 satisfying x^2-3*cos(x)=2.
%C A198828 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198828 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198828 1.49368665783465257664879079922390571614111...
%t A198828 a = 1; b = -3; c = 2;
%t A198828 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198828 Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]
%t A198828 r = x /. FindRoot[f[x] == g[x], {x, 1.49, 1.5}, WorkingPrecision -> 110]
%t A198828 RealDigits[r] (* A198828 *)
%Y A198828 Cf. A198755.
%K A198828 nonn,cons
%O A198828 1,2
%A A198828 _Clark Kimberling_, Oct 30 2011