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 A198879 #10 Feb 07 2025 17:46:56
%S A198879 1,0,9,1,6,0,2,4,7,5,2,5,0,6,5,0,8,3,1,6,8,6,9,6,9,3,0,1,5,1,2,9,5,3,
%T A198879 4,9,6,9,6,0,2,7,0,5,7,7,3,2,6,4,9,1,2,0,0,3,3,1,3,1,8,5,0,5,5,8,6,3,
%U A198879 4,1,8,3,3,6,8,3,5,5,0,7,9,0,7,6,3,4,8,6,0,7,3,7,2,5,4,2,7,7,5
%N A198879 Decimal expansion of x>0 satisfying 2*x^2-3*cos(x)=1.
%C A198879 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198879 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198879 1.091602475250650831686969301512953496960...
%t A198879 a = 2; b = -3; c = 1;
%t A198879 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198879 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198879 r = x /. FindRoot[f[x] == g[x], {x, 1.09, 1.1}, WorkingPrecision -> 110]
%t A198879 RealDigits[r] (* A198879 *)
%Y A198879 Cf. A198755.
%K A198879 nonn,cons
%O A198879 1,3
%A A198879 _Clark Kimberling_, Oct 31 2011