| EXAMPLE
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For n = 45, there exists the following subsets of its divisors larger than one (3, 5, 9, 15, 45) that satisfy the condition that the least common multiple of the members is 45, and the sum does not exceed 45: (45), (3, 9, 15), (3, 5, 9, 15), (3, 5, 9)}, (), (5, 9), (9, 15) and (5, 9, 15), altogether seven subsets, thus a(45) = 7.
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