A017957 - OEIS

%I #18 Sep 08 2022 08:44:43

%S 1,5,17,71,289,1192,4913,20257,83521,344366,1419857,5854221,24137569,

%T 99521747,410338673,1691869692,6975757441,28761784748,118587876497,

%U 488950340715,2015993900449,8312155792153

%N Powers of sqrt(17) rounded up.

%H Vincenzo Librandi, <a href="/A017957/b017957.txt">Table of n, a(n) for n = 0..800</a>

%t With[{c=Sqrt[17]},Ceiling/@(c^Range[0,30])]  (* _Harvey P. Dale_, Jan 09 2011 *)

%t Ceiling[(Sqrt[17])^Range[0,40]] (* _Vincenzo Librandi_, Nov 21 2011 *)

%o (Magma) [Ceiling(Sqrt(17^n)): n in [0..30]]; // _Vincenzo Librandi_, Nov 21 2011

%K nonn

%O 0,2

%A _N. J. A. Sloane_