%I #11 Jun 22 2022 18:19:04
%S 1,2,4,9,20,42,89,189,400,845,1788,3782,8000,16917,35777,75659,160000,
%T 338358,715541,1513186,3200000,6767176,14310835,30263731,64000000,
%U 135343521,286216701,605274629,1280000000,2706870434,5724334022,12105492595,25600000000
%N Powers of fourth root of 20 rounded down.
%t Floor[(Power[20, (4)^-1])^Range[0,30]] (* _Harvey P. Dale_, Apr 25 2011 *)
%Y Cf. A011016, A018103, A018104.
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_