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 A239415 Numbers n such that n^7-7 is prime. 5
 60, 66, 132, 212, 242, 246, 290, 296, 312, 326, 380, 384, 446, 516, 524, 554, 654, 704, 740, 782, 834, 1026, 1086, 1142, 1154, 1172, 1182, 1214, 1424, 1430, 1464, 1482, 1494, 1500, 1524, 1604, 1682, 1686, 1752, 1794, 1796, 1844, 1854, 1940, 1952, 1980, 2000, 2010 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Note that all the numbers in this sequence are even. LINKS EXAMPLE 60^7-7 = 2799359999993 is prime. Thus, 60 is a member of this sequence. PROG (Python) import sympy from sympy import isprime {print(n) for n in range(10**4) if isprime(n**7-7)} CROSSREFS Cf. A028870, A153974, A239344, A239413, A239414. Sequence in context: A118155 A066722 A080862 * A106130 A216828 A345997 Adjacent sequences:  A239412 A239413 A239414 * A239416 A239417 A239418 KEYWORD nonn AUTHOR Derek Orr, Mar 17 2014 STATUS approved

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Last modified December 7 20:39 EST 2021. Contains 349589 sequences. (Running on oeis4.)