A017963 - OEIS

%I #11 Sep 08 2022 08:44:43

%S 1,5,19,83,361,1574,6859,29898,130321,568057,2476099,10793066,

%T 47045881,205068241,893871739,3896296579,16983563041,74029634997,

%U 322687697779,1406563064943,6131066257801,26724698233907

%N Powers of sqrt(19) rounded up.

%H Vincenzo Librandi, <a href="/A017963/b017963.txt">Table of n, a(n) for n = 0..700</a>

%t Ceiling[(Sqrt[19])^Range[0,40]] (* _Vincenzo Librandi_, Nov 21 2011 *)

%o (Magma) [Ceiling(Sqrt(19^n)): n in [0..30]]; // _Vincenzo Librandi_, Nov 21 2011

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_