OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = floor(n*(4+sqrt(6))/2). - Vincenzo Librandi, Oct 25 2011
MATHEMATICA
PROG
(Magma) [Floor(n*(4+Sqrt(6))/2): n in [1..80]]; // Vincenzo Librandi, Oct 25 2011
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Aug 17 2011
STATUS
approved