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A053728
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For n=1,2,3,..., compute sum of aliquot divisors of n; if result is prime append this prime to sequence.
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0
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3, 7, 11, 13, 31, 13, 17, 43, 17, 23, 41, 19, 19, 23, 73, 41, 29, 31, 127, 47, 37, 31, 89, 73, 43, 29, 131, 71, 37, 47, 31, 31, 53, 83, 157, 97, 59, 97, 137, 101, 37, 67, 107, 41, 37, 523, 109, 113, 73, 211, 43, 79, 61, 43, 131, 191, 41, 463, 241, 67, 89, 43, 53, 103, 167
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