A018120 - OEIS

%I #4 Mar 30 2012 16:46:24

%S 1,1,1,1,2,3,3,4,5,7,9,11,13,17,21,27,33,41,52,65,81,100,125,156,195,

%T 243,302,377,469,585,729,908,1131,1409,1755,2187,2724,3393,4227,5266,

%U 6561,8173,10181,12683,15800,19683

%N Powers of fifth root of 3 rounded down.

%K nonn

%O 0,5

%A _N. J. A. Sloane_.