%I #7 Jun 23 2022 23:13:43
%S 1,2,4,9,20,42,89,189,400,846,1789,3783,8000,16918,35777,75659,160000,
%T 338359,715542,1513187,3200000,6767176,14310835,30263731,64000000,
%U 135343522,286216701,605274630,1280000000
%N Powers of fourth root of 20 rounded to nearest integer.
%Y Cf. A011016, A018102, A018104.
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_