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A099008
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Numbers n such that the denominator of the 2n-th Bernoulli number contains n but sum_{d|n} sigma(d)/phi(d) is not an integer.
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0
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546, 903, 1806, 2730, 6162, 6510, 9030, 10230, 12090, 12246, 12810, 15834, 20130, 20670, 23478, 23790, 28938, 30030, 30810
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