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Omni-MATH / Call a subset S of 1,2,…,n …a and b are elements of S whose average is an integer, that average is also an element of S. Let A(n) be the number of mediocre subsets of 1,2,…,n. … · Discussion

Discussing Call a subset S of {1,2,…,n} …a and b are elements of S whose average is an integer, that average is also an element of S. Let A(n) be the number of mediocre subsets of {1,2,…,n}. … · Omni-MATH

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