OFFSET
1,4
FORMULA
[1/s]+[2/s]+...+[n/s], where s=(3+sqrt(3))/2, []=floor.
MATHEMATICA
With[{c=(3+Sqrt[3])/2}, Accumulate[Floor[Range[60]/c]]] (* Harvey P. Dale, Mar 30 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Dec 26 2010
STATUS
approved