A292006 Primes of the form Phi(k, -2), where Phi is the cyclotomic polynomial.
3, 5, 11, 7, 43, 17, 31, 683, 13, 2731, 127, 331, 257, 43691, 73, 174763, 5419, 2796203, 241, 8191, 151, 715827883, 65537, 131071, 524287, 22366891, 61681, 2932031007403, 18837001, 4363953127297, 262657, 15790321, 768614336404564651, 2147483647, 77158673929
Offset: 1
Keywords
Links
Crossrefs
Cf. A138928.
Programs
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Mathematica
Select[Table[Cyclotomic[k,-2], {k, 0, 100}], PrimeQ[#] &]