OFFSET
1,2
FORMULA
Round(n*(sqrt(2*n))). - Vladeta Jovovic, Jun 14 2003
MATHEMATICA
Table[Round[n Sqrt[2n]], {n, 50}] (* Harvey P. Dale, Feb 10 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jul 30 2000
STATUS
approved