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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) $

Link to the paper:http://www.jstor.org/pss/119039

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closed as too localized by Phira, t.b., Gerry Myerson, J. M., Byron Schmuland Oct 31 '11 at 12:32

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A link would be nice, it will give some order to it. –  picakhu Feb 2 '11 at 15:34
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
I had committed a mistake while calculating using that assumption.Now, I understand the notation.Thanks. –  Ravi Kiran Feb 2 '11 at 18:20