A017938 - OEIS

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

%S 1,3,11,36,121,401,1331,4414,14641,48559,161051,534146,1771561,

%T 5875603,19487171,64631634,214358881,710947979,2357947691,7820427766,

%U 25937424601,86024705430,285311670611

%N Powers of sqrt(11) rounded to nearest integer.

%H Vincenzo Librandi, <a href="/A017938/b017938.txt">Table of n, a(n) for n = 0..1000</a>

%t Floor[(Sqrt[11]^Range[0,40]+1/2)] (* _Vincenzo Librandi_, Nov 19 2011 *)

%o (PARI) a(n)=round(sqrt(11)^n) \\ _Charles R Greathouse IV_, Nov 18 2011

%o (Magma) [Round(Sqrt(11)^n): n in [0..40]]; // _Vincenzo Librandi_, Nov 19 2011

%K nonn

%O 0,2

%A _N. J. A. Sloane_