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A128234
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Values of n such that the average of p(n) and p(p(n)), where p(k) denotes the k-th prime, is prime.
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1
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8, 9, 11, 12, 19, 23, 28, 62, 64, 68, 71, 85, 95, 104, 114, 115, 131, 134, 175, 178, 181, 182, 200, 216, 240, 246, 247, 250, 266, 276, 277, 316, 346, 372, 382, 421, 429, 438, 440, 444, 445, 458, 469, 485, 494, 511, 518, 541, 543, 566, 568, 594, 596, 601, 604
(list; graph; refs; listen; history; internal format)
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