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Ceiling(3^n/n).
1

%I #8 Sep 08 2022 08:45:30

%S 3,5,9,21,49,122,313,821,2187,5905,16105,44287,122641,341641,956594,

%T 2690421,7596481,21523361,61171657,174339221,498112058,1426411801,

%U 4093181689,11767897354,33891544378,97764070321,282429536481

%N Ceiling(3^n/n).

%H Vincenzo Librandi, <a href="/A129787/b129787.txt">Table of n, a(n) for n = 1..1000</a>

%t Table[Ceiling[3^n / n], {n, 30}] (* _Vincenzo Librandi_, Feb 12 2013 *)

%o (Magma) [Ceiling(3^n / n): n in [1..35]]; // _Vincenzo Librandi_, Feb 12 2013

%Y Cf. A053638.

%K nonn,easy

%O 1,1

%A _Mohammad K. Azarian_, May 18 2007