A018097 - OEIS

%I #7 Nov 21 2013 12:46:09

%S 1,2,4,9,18,37,76,157,324,667,1375,2831,5832,12013,24743,50965,104976,

%T 216226,445375,917370,1889568,3892070,8016758,16512655,34012224,

%U 70057261,144301645,297227788,612220032

%N Powers of fourth root of 18 rounded to nearest integer.

%t Floor[(Power[18, (4)^-1])^Range[0,30]+1/2] (* _Harvey P. Dale_, May 25 2011 *)

%K nonn

%O 0,2

%A _N. J. A. Sloane_.