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A216181
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Numbers n such that (11^n - 4^n)/7 is prime.
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5
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OFFSET
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1,1
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COMMENTS
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All terms are prime.
Next term > 10^5.
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LINKS
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MATHEMATICA
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Select[Prime[Range[1, 100000]], PrimeQ[(11^# - 4^#)/7]&]
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PROG
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CROSSREFS
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Cf. A004063, A028491, A057468, A059801, A121877, A128024, A128025, A128026, A128027, A128028, A128029, A128030, A128031, A128032, A210506.
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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