On 24 Dec 2000 08:04:17 -0500, [EMAIL PROTECTED] (Herman
Rubin) wrote:
>If there is a simple form, it will involve using results
>from some version of number theory. The generating function
>of the total is (\prod_1^n (1+x^k) )/2^n. If the mean n(n+1)/2
>is subtracted, the characteristic function is \prod cos(kt/2).
Probably a typo, but the mean is in fact n(n+1)/4
indeed it is easy to see that E(X^k)=sum_x=1_to_n [x^k/2]
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