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A081391
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n is such that C[2n,n] central binomial coefficient has only one prime divisor of which exponent equals one, i.e. A081387[n]=1; C[2n,n] with one non-unitary prime divisor.
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2
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3, 6, 7, 8, 9, 10, 11, 12, 16, 21, 22, 28, 29, 30, 31, 36, 37, 54, 55, 57, 58, 110, 171, 784, 786
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