# Multinomial Coefficients ! [closed]

I have come across a paper that has suggested a formula for "NUMBER OF MULTINOMIAL COEFFICIENTS NOT DIVISIBLE BY A PRIME"; but I don't understand the notation.Please help. The formula is:

$G(n,l,p)= \sum_{k=0}^m(l,p-1)^k\frac{a^k}{l}\prod_{i=k}^m(l-1,a_i)$

What is it you don't understand? $\sum$ and $\prod$? –  Calle Feb 2 '11 at 17:22
If it's $(l, p-1)$, this is defined first in the introduction as $(j_1, j_2, \dots, j_l) = \frac{n!}{j_1!j_2! \cdots j_l!}$. –  Calle Feb 2 '11 at 17:47