Times the factorial
Writing functions:
factorialmultiply(n, m)
Formula:
factorialmultiply(n, m) = factorialmultiply(1, m-1) * factorialmultiply(2, m-1)* ... * factorialmultiply(n, m-1)
Suppose that: factorialmultiply(n, 1)=factorial(n) and factorialmultiply(n, 0)=n ,factorialmultiply(0, m)=1