Yellowstone sequence: Difference between revisions
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→The Yellowstone Permutation
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The '''Yellowstone sequence''', also called the '''Yellowstone permutation''', is defined as:
====a(n) = n====
For n >= 4,
====a(n) = the smallest number not already in sequence such that a(n) is relatively prime to a(n-1) and is not relatively prime to a(n-2).====
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