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 A198557 #8 Apr 23 2025 12:42:43
%S A198557 1,0,6,9,8,5,8,4,8,0,7,6,7,5,6,5,4,2,5,5,4,2,3,4,5,6,2,6,8,0,4,1,1,8,
%T A198557 0,2,1,6,2,7,2,6,3,9,7,2,4,2,9,2,4,0,6,0,1,2,4,9,1,2,7,9,0,4,9,1,6,5,
%U A198557 2,5,4,3,6,7,0,8,2,3,1,3,2,1,4,3,4,2,2,2,6,6,7,4,6,9,8,9,1,1,3
%N A198557 Decimal expansion of x>0 having 4*x^2-x=4*sin(x).
%C A198557 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198557 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198557 1.069858480767565425542345626804118021627263...
%t A198557 a = 4; b = -1; c = 4;
%t A198557 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198557 Plot[{f[x], g[x]}, {x, -.1, 1.2}]
%t A198557 r = x /. FindRoot[f[x] == g[x], {x, 1, 1.1}, WorkingPrecision -> 110]
%t A198557 RealDigits[r] (* A198557 *)
%Y A198557 Cf. A198414.
%K A198557 nonn,cons
%O A198557 1,3
%A A198557 _Clark Kimberling_, Oct 26 2011