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A122535 Smallest prime of a triple of successive primes, where the middle one is the arithmetic mean of the other two. +0
2
3, 47, 151, 167, 199, 251, 257, 367, 557, 587, 601, 647, 727, 941, 971, 1097, 1117, 1181, 1217, 1361, 1499, 1741, 1747, 1901, 2281, 2411, 2671, 2897, 2957, 3301, 3307, 3631, 3727, 4007, 4397, 4451, 4591, 4651, 4679, 4987, 5101, 5107, 5297, 5381, 5387 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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