A018140 - OEIS

%I #8 Sep 03 2022 22:06:51

%S 1,2,3,4,6,9,14,22,34,53,81,126,196,303,470,729,1132,1756,2725,4228,

%T 6561,10182,15801,24520,38051,59049,91635,142204,220678,342458,531441,

%U 824715,1279830,1986098,3082117,4782969

%N Powers of the fifth root of 9 rounded up.

%H Harvey P. Dale, <a href="/A018140/b018140.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) = ceiling(9^(n/5)). - _Wesley Ivan Hurt_, Sep 03 2022

%t Ceiling[(9^(1/5))^Range[0,40]] (* _Harvey P. Dale_, Jun 04 2012 *)

%K nonn

%O 0,2

%A _N. J. A. Sloane_.