DivisorSum[MoebiusMu[Subscript[d, j]]^2, {Subscript[d, j], n}] == 2^k /; FactorInteger[n] == {{Subscript[p, 1], Subscript[n, 1]}, \[Ellipsis], {Subscript[p, k], Subscript[n, k]}} && Element[Subscript[n, j], Integers] && Subscript[n, j] > 0 && Element[Subscript[p, j], Primes] && Element[Subscript[d, j], Divisors[n]]

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2001-10-29