

A283051


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.


0




OFFSET

1,1


COMMENTS

Conjecture: sequence is infinite.
a(5) >= 18.


LINKS

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


CROSSREFS

Cf. A019434, A023394, A228845, A228846, A229857, A231203.
Sequence in context: A054871 A248644 A242197 * A244671 A232531 A182637
Adjacent sequences: A283048 A283049 A283050 * A283052 A283053 A283054


KEYWORD

nonn,hard,more


AUTHOR

Arkadiusz Wesolowski, Feb 27 2017


STATUS

approved



