OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = floor(n*sqrt(11)). - Jon E. Schoenfield, Jun 18 2010
MATHEMATICA
With[{c = Sqrt[11]}, Floor[c #]& / @Range[1, 80]] (* Vincenzo Librandi, Aug 01 2013 *)
PROG
(PARI) a(n)=sqrtint(11*n^2) \\ Charles R Greathouse IV, Dec 28 2011
(Magma) [Isqrt(11*n^2): n in [1..80]]; // Vincenzo Librandi, Aug 01 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jan 21 2010
STATUS
approved