# COMPUTE k-PERMUTATIONS OF n OBJECTS

The permutation of n objects taken k at a time is denoted by {}^{n}\text{P}_{k} or \text{P}(n,k) and is equal to n(n - 1)(n - 2) ... (n - k + 1). It is also known as the k-permutations of n objects.
I cannot compute \text{C}_{m} for m > 3. This may be due to old age, stupidity, and laziness.

- Paul ErdÅ‘s