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Omni-MATH / Let n>1 be an integer. Find, with proof, all sequences x₁,x₂,…,x_(n−1) of positive integers with the following three properties: (a). ; (b). for all ; (c). given any two indices an…

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problem

Let n>1n > 1 be an integer. Find, with proof, all sequences x1,x2,…,xn−1x_1, x_2, \ldots, x_{n-1} of positive integers with the following three properties: (a). ; (b). for all ; (c). given any two indices and (not necessarily distinct) for which , there is an index such that .
Plain-text mathematical notation (without MathML)
Let n>1 be an integer. Find, with proof, all sequences x₁,x₂,…,x_(n−1) of positive integers with the following
three properties:
 (a). ; (b). for all ; (c). given any two indices and (not necessarily distinct)
for which , there is an index such
that .
Original LaTeX notation
Let $n > 1$ be an integer. Find, with proof, all sequences $x_1, x_2, \ldots, x_{n-1}$ of positive integers with the following
three properties:
 (a). ; (b). for all ; (c). given any two indices and (not necessarily distinct)
for which , there is an index such
that .

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