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 A198827 #10 Feb 07 2025 16:44:05
%S A198827 1,1,3,5,3,9,0,0,6,7,0,2,6,9,1,7,2,0,7,3,6,5,4,2,3,8,3,9,7,6,4,5,8,0,
%T A198827 0,0,0,4,0,9,1,5,3,4,5,8,9,6,7,2,7,2,0,3,0,6,2,9,6,2,2,0,6,8,9,0,0,5,
%U A198827 8,5,3,4,3,4,9,3,0,6,8,8,1,8,1,7,9,7,0,3,2,3,2,6,4,2,4,8,0,8,6
%N A198827 Decimal expansion of x>0 satisfying 2*x^2+cos(x)=3.
%C A198827 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198827 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198827 1.13539006702691720736542383976458000040...
%t A198827 a = 2; b = 1; c = 3;
%t A198827 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198827 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198827 r = x /. FindRoot[f[x] == g[x], {x, 1.3, 1.4}, WorkingPrecision -> 110]
%t A198827 RealDigits[r] (* A198827 *)
%Y A198827 Cf. A198755.
%K A198827 nonn,cons
%O A198827 1,3
%A A198827 _Clark Kimberling_, Oct 31 2011