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A111517
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Numbers n such that (7*n + 1)/2 is prime.
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0
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3, 15, 19, 31, 39, 43, 51, 55, 75, 79, 99, 111, 123, 139, 159, 163, 171, 175, 183, 195, 211, 231, 235, 259, 279, 283, 291, 295, 303, 315, 319, 339, 343, 351, 379, 411, 415, 423, 435, 451, 459, 463, 475
(list; graph; refs; listen; history; internal format)
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