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 A197392 #13 Apr 10 2021 11:48:01
%S A197392 0,8,9,3,1,1,7,7,4,8,5,4,4,8,4,7,6,2,9,4,4,5,4,2,3,6,0,1,7,1,0,9,9,4,
%T A197392 7,7,0,8,2,6,4,5,8,9,5,0,0,5,0,8,4,9,4,2,4,4,4,3,9,3,3,8,9,1,3,0,1,1,
%U A197392 5,7,8,4,5,7,0,9,8,7,2,0,2,8,1,0,1,7,1,0,3,2,5,5,5,9,6,8,4,7,2
%N A197392 Decimal expansion of least x > 0 having sin(Pi*x/4) = sin(3*x)^2.
%C A197392 The Mathematica program includes a graph. See A197133 for a guide to least x > 0 satisfying sin(b*x) = sin(c*x)^2 for selected b and c.
%e A197392 x=0.0893117748544847629445423601710994770...
%t A197392 b = Pi/4; c = 3; f[x_] := Sin[x]
%t A197392 t = x /. FindRoot[f[b*x] == f[c*x]^2, {x, .08, .09}, WorkingPrecision -> 200]
%t A197392 RealDigits[t](* A197392 *)
%t A197392 Plot[{f[b*x], f[c*x]^2}, {x, 0, 0.8}]
%Y A197392 Cf. A197133.
%K A197392 nonn,cons
%O A197392 0,2
%A A197392 _Clark Kimberling_, Oct 14 2011