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 A198921 #8 Feb 07 2025 17:47:57
%S A198921 7,9,6,1,6,7,2,6,3,0,8,3,4,1,6,0,4,4,9,9,6,7,0,6,2,1,3,3,3,2,0,5,7,0,
%T A198921 1,3,8,1,2,9,7,9,7,9,3,2,6,4,2,0,0,9,3,5,1,5,6,3,6,4,4,5,2,9,7,4,3,1,
%U A198921 1,7,2,2,3,6,9,0,7,6,4,0,1,5,3,9,9,3,5,9,6,2,4,3,0,4,8,0,8,3,0
%N A198921 Decimal expansion of x>0 satisfying 3*x^2+3*cos(x)=4.
%C A198921 See A198755 for a guide to related sequences. The Mathematica program includes a graph.
%H A198921 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198921 0.79616726308341604499670621333205701...
%t A198921 a = 3; b = 3; c = 4;
%t A198921 f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
%t A198921 Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
%t A198921 r = x /. FindRoot[f[x] == g[x], {x, .79, .8}, WorkingPrecision -> 110]
%t A198921 RealDigits[r] (* A198921 *)
%Y A198921 Cf. A198755.
%K A198921 nonn,cons
%O A198921 0,1
%A A198921 _Clark Kimberling_, Oct 31 2011