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Omni-MATH / Call a sequence of positive integers a_(n) good if for any distinct positive integers m,n, one has gcd(m,n)∣a_(m)²+a_(n)² and gcd(a_(m),a_(n))∣m²+n². Call a positive integer a to… · Discussion
Discussing Call a sequence of positive integers {a_(n)} good if for any distinct positive integers m,n, one has gcd(m,n)∣a_(m)²+a_(n)² and gcd(a_(m),a_(n))∣m²+n². Call a positive integer a to… · Omni-MATH
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