%I #14 Sep 08 2022 08:44:43

%S 1,4,13,47,169,609,2197,7921,28561,102978,371293,1338716,4826809,

%T 17403307,62748517,226242996,815730721,2941158942,10604499373,

%U 38235066240,137858491849,497055861120,1792160394037

%N Powers of sqrt(13) rounded to nearest integer.

%H Vincenzo Librandi, <a href="/A017944/b017944.txt">Table of n, a(n) for n = 0..1000</a>

%t Floor[(Sqrt[13]^Range[0,40]+1/2)] (* _Vincenzo Librandi_, Nov 19 2011 *)

%o (PARI) a(n)=round(sqrt(13)^n) \\ _Charles R Greathouse IV_, Nov 18 2011

%o (Magma) [Round(Sqrt(13)^n): n in [0..40]]; // _Vincenzo Librandi_, Nov 19 2011

%K nonn

%O 0,2

%A _N. J. A. Sloane_