Making Necklaces

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There are ways to make a necklace using
beads of
colors, with
being the totient function. Build and wear them all!
Contributed by: Michael Trott with permission of Springer (March 2011)
From: The Mathematica Guidebook for Numerics, second edition by Michael Trott (© Springer, 2008).
Open content licensed under CC BY-NC-SA
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"Making Necklaces"
http://demonstrations.wolfram.com/MakingNecklaces/
Wolfram Demonstrations Project
Published: March 7 2011