CombinationsA with repetition
  

Returnes number of combinations with repetition for given objects.

syntax
CombinationsA(number_objects; number_chosen_objects)
number_all_objects (n) - number of all objects
number_chosen_objects (k) - number objects in combination

returns
not negative integer number.

info
- fractional number are converted into integer,
- "number_all_objects" must be greater than "number_chosen_objects".
Formula of this function: (n+k-1)!/(k!*(n-1)!)

example
CombinationsA(10;3) = 220