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Omni-MATH / On a blackboard a stranger writes the values of s₇(n)² for n=0,1,…,7²⁰−1, where s₇(n) denotes the sum of digits of n in base 7 . Compute the average value of all the numbers on the… · Discussion

Discussing On a blackboard a stranger writes the values of s₇(n)² for n=0,1,…,7²⁰−1, where s₇(n) denotes the sum of digits of n in base 7 . Compute the average value of all the numbers on the… · Omni-MATH

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