A008994 - OEIS

%I #9 Jul 21 2018 16:23:43

%S 1,18,3240,1224720,62985600,87298041600,857965152844800,

%T 1575854362368000,14540529421135872000,20363866049006577377280000,

%U 5760064968147574743859200000,2384666896813095943957708800000

%N Denominators of coefficients in expansion of cube root of sin(x).

%H G. C. Greubel, <a href="/A008994/b008994.txt">Table of n, a(n) for n = 0..197</a>

%t Denominator[CoefficientList[Series[(Sin[x]/x)^(1/3), {x, 0, 50}], x][[1 ;; -1 ;; 2]]] (* _G. C. Greubel_, Jul 21 2018 *)

%K nonn

%O 0,2

%A _N. J. A. Sloane_