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A292015
Primes of the form Phi(k, 2), where Phi is the cyclotomic polynomial.
2
3, 7, 5, 31, 3, 127, 17, 73, 11, 13, 8191, 43, 151, 257, 131071, 524287, 683, 241, 2731, 262657, 331, 2147483647, 65537, 599479, 43691, 174763, 61681, 5419, 2796203, 4432676798593, 15790321, 2305843009213693951, 715827883, 145295143558111, 10052678938039
OFFSET
1,1
FORMULA
a(n) = A019320(A072226(n)). - Max Alekseyev, Apr 25 2018
MATHEMATICA
Select[Table[Cyclotomic[k, 2], {k, 0, 100}], PrimeQ[#] &]
CROSSREFS
Sequence in context: A112927 A097406 A064078 * A342660 A186522 A048857
KEYWORD
nonn
AUTHOR
Robert Price, Sep 07 2017
STATUS
approved