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A051816
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Number of n-digit numbers with nonzero multiplicative digital root 5.
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1
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1, 7, 58, 422, 2872, 19772, 142418, 1096582, 9040811, 78452199, 699839588, 6297456806, 56804155533, 517737762700, 4839960759976, 46837953974511
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