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Omni-MATH / For a sequence a₁<a₂<⋯<a_(n) of integers, a pair (a_(i),a_(j)) with 1≤i<j≤n is called [i]interesting[/i] if there exists a pair (a_(k),a_(l)) of integers with 1≤k<l≤n such that … · Discussion

Discussing For a sequence a₁<a₂<⋯<a_(n) of integers, a pair (a_(i),a_(j)) with 1≤i<j≤n is called [i]interesting[/i] if there exists a pair (a_(k),a_(l)) of integers with 1≤k<l≤n such that … · Omni-MATH

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