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A291993
Primes of the form Phi(k, -7), where Phi is the cyclotomic polynomial.
1
43, 117307, 2801, 6568801, 29078814248401, 3421093417510114543, 79787519018560501, 16148168401, 1628413557556843, 13564461457, 402488219476647465854701, 13841169553, 11898664849, 655417289594537954307682339857743931943, 33232924804801
OFFSET
1,1
MATHEMATICA
Select[Table[Cyclotomic[k, -7], {k, 0, 100}], PrimeQ[#] &]
CROSSREFS
Cf. A138923.
Sequence in context: A185558 A155477 A212738 * A228546 A125828 A177417
KEYWORD
nonn
AUTHOR
Robert Price, Sep 07 2017
STATUS
approved