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 A198928 #8 Feb 07 2025 19:48:01
%S A198928 8,7,2,8,0,4,1,7,8,2,0,3,9,0,8,2,7,1,7,4,8,5,4,3,3,8,9,3,2,0,5,1,4,8,
%T A198928 9,2,1,9,5,2,4,4,8,5,3,4,1,4,2,0,7,4,5,6,5,0,7,9,0,9,4,4,8,8,9,6,8,3,
%U A198928 7,1,8,9,4,9,3,9,0,6,6,3,0,8,2,2,0,8,0,7,0,6,2,7,8,3,1,3,1,2,2
%N A198928 Decimal expansion of x>0 satisfying 3*x^2-2*cos(x)=1.
%C A198928 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198928 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198928 0.872804178203908271748543389320514892195244...
%t A198928 a = 3; b = -2; c = 1;
%t A198928 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198928 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198928 r = x /. FindRoot[f[x] == g[x], {x, .87, .88}, WorkingPrecision -> 110]
%t A198928 RealDigits[r] (* A198928 *)
%Y A198928 Cf. A198755.
%K A198928 nonn,cons
%O A198928 0,1
%A A198928 _Clark Kimberling_, Oct 31 2011