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 A198547 #8 Apr 23 2025 12:39:43
%S A198547 1,2,5,6,7,7,6,8,9,5,9,6,1,2,7,1,7,3,0,4,4,1,8,9,1,1,5,1,2,6,5,6,7,1,
%T A198547 8,6,8,6,7,1,2,7,1,7,8,6,2,1,0,4,6,3,3,2,4,6,2,1,8,6,5,9,0,3,4,3,3,6,
%U A198547 9,4,8,7,3,8,0,3,2,5,4,8,4,3,7,5,0,7,6,0,9,2,1,3,6,9,6,0,5,0,9
%N A198547 Decimal expansion of x>0 having 2*x^2-x=2*sin(x).
%C A198547 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198547 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198547 1.2567768959612717304418911512656718686...
%t A198547 a = 2; b = -1; c = 2;
%t A198547 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198547 Plot[{f[x], g[x]}, {x, -.1, 1.5}]
%t A198547 r = x /. FindRoot[f[x] == g[x], {x, 1.25, 1.26}, WorkingPrecision -> 110]
%t A198547 RealDigits[r] (* A198547 *)
%Y A198547 Cf. A198414.
%K A198547 nonn,cons
%O A198547 1,2
%A A198547 _Clark Kimberling_, Oct 26 2011