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Possible Duplicate:
Circular permutations with indistinguishable objects

We can compute the total number of k-ary necklaces/bracelets of length n using the Euler totient function:

http://en.wikipedia.org/wiki/Necklace_%28combinatorics%29

Apparently there is a formula for the number of k-ary necklaces/bracelets when the number of beads for each color is fixed.

For example, the number of necklaces/bracelets of length 5, made up of three colors (red, green, blue), with 2 red beads, 2 green beads, and 1 blue bead. etc.

Can anyone provide the formula or a reference?

Thanks

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