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sum over i+j+k==n

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  • Subject: [mg84423] sum over i+j+k==n
  • From: "Jack Kennedy" <jack at>
  • Date: Sun, 23 Dec 2007 04:36:05 -0500 (EST)

Hi All,
I often find myself needing to sum over triples
(or other tuples) like i,j,k where i+j+k=n. Is there
a convenient way to write this in Mathematica?

(version 5.1)

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