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A283051
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Positive integers n such that none of the primes of the form k*2^n + 1 (with k odd) divide any Fermat number F(m) = 2^(2^m) + 1, m >= 0.
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0
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OFFSET
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1,1
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COMMENTS
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Conjecture: sequence is infinite.
a(5) >= 18.
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LINKS
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Table of n, a(n) for n=1..4.
Proth Search Page, Prime factors of Fermat numbers
Eric Weisstein's World of Mathematics, Fermat Number
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CROSSREFS
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Cf. A019434, A023394, A228845, A228846, A229857, A231203.
Sequence in context: A054871 A248644 A242197 * A244671 A232531 A182637
Adjacent sequences: A283048 A283049 A283050 * A283052 A283053 A283054
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KEYWORD
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nonn,hard,more
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AUTHOR
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Arkadiusz Wesolowski, Feb 27 2017
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STATUS
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approved
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