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Omni-MATH / For an integer n, let f(n) denote the number of pairs (x,y) of integers such that x²+xy+y²=n. Compute the sum ∑_(n=1)^(10⁶)nf(n) · Discussion

Discussing For an integer n, let f(n) denote the number of pairs (x,y) of integers such that x²+xy+y²=n. Compute the sum ∑_(n=1)^(10⁶)nf(n) · Omni-MATH

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