Returns the number of permutations[1][2] of n unlike things taken k at a time.
Syntax:
PERMUT( n:Number, k:Number )
This function yields the number of permutations of n unlike things taken k at a time.
Formula:
nPk = n! ∕ (n − k)!
For very large n an approximation is achieved using logarithms.
Revisions:
This function was added in 1.30.