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A138306 Least prime p such that 2n = p + g, where g is a prime primitive root of p, or 0 if there is no such prime p. +0
2
0, 0, 0, 5, 7, 7, 0, 0, 11, 13, 17, 13, 0, 17, 23, 19, 23, 0, 0, 23, 23, 31, 43, 29, 37, 41, 37, 37, 41, 41, 43, 0, 47, 61, 41, 43, 67, 47, 47, 67, 59, 53, 73, 47, 47, 61, 53, 59, 67, 0, 59, 61, 59, 67, 97, 89, 97, 79, 71, 61, 79, 71, 73, 67, 71, 71, 97, 83, 71, 137, 113, 0, 103, 89 (list; graph; listen)
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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.


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