OFFSET
0,2
COMMENTS
Also integer part of n*6.2513025865..., where the constant is the largest root of x^4 -40*x^2 +36.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
MATHEMATICA
With[{c = Sqrt[13] + Sqrt[7]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)
PROG
(Magma) [Floor(n*(Sqrt(13)+Sqrt(7))): n in [0..60]];
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Vincenzo Librandi, Feb 01 2010
STATUS
approved