A291993 Primes of the form Phi(k, -7), where Phi is the cyclotomic polynomial.

43, 117307, 2801, 6568801, 29078814248401, 3421093417510114543, 79787519018560501, 16148168401, 1628413557556843, 13564461457, 402488219476647465854701, 13841169553, 11898664849, 655417289594537954307682339857743931943, 33232924804801

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..23

Yves Gallot, Cyclotomic polynomials and prime numbers

Index entries for cyclotomic polynomials,values at X

Mathematica

Select[Table[Cyclotomic[k, -7], {k, 0, 100}], PrimeQ[#] &]

Crossrefs

Cf. A138923.

Sequence in context: A185558 A155477 A212738 * A228546 A125828 A177417

Adjacent sequences: A291990 A291991 A291992 * A291994 A291995 A291996

Keyword

nonn

Author

Robert Price, Sep 07 2017

Status

approved