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 A198426 #8 Apr 23 2025 12:35:23
%S A198426 1,1,6,0,5,9,1,8,6,7,1,9,0,0,5,4,1,5,7,3,1,3,3,0,8,2,5,0,4,3,3,0,5,5,
%T A198426 3,3,6,3,1,7,9,7,1,3,3,9,1,5,9,1,0,6,1,2,8,3,8,4,9,9,4,1,2,5,7,6,1,4,
%U A198426 2,2,3,4,0,0,1,8,4,9,8,2,7,4,7,9,5,0,6,5,3,9,1,8,4,9,1,6,2,8,5
%N A198426 Decimal expansion of x>0 having x^2+2x=4*sin(x).
%C A198426 See A198414 for a guide to related sequences. The Mathematica program includes a graph.
%H A198426 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A198426 1.1605918671900541573133082504330553363179713...
%t A198426 a = 1; b = 2; c = 4;
%t A198426 f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
%t A198426 Plot[{f[x], g[x]}, {x, -.2, 2}]
%t A198426 r = x /. FindRoot[f[x] == g[x], {x, 1.16, 1.17}, WorkingPrecision -> 110]
%t A198426 RealDigits[r] (* A198426 *)
%Y A198426 Cf. A198414.
%K A198426 nonn,cons
%O A198426 1,3
%A A198426 _Clark Kimberling_, Oct 25 2011