A292003 Primes of the form Phi(k, -4), where Phi is the cyclotomic polynomial.

13, 17, 257, 241, 65537, 61681, 15790321, 4278255361, 4562284561, 291280009243618888211558641, 18446744069414584321, 78919881726271091143763623681, 84179842077657862011867889681, 20988936657440586486151264256610222593863921, 84159375948762099254554456081

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..16

Yves Gallot, Cyclotomic polynomials and prime numbers

Index entries for cyclotomic polynomials,values at X

Mathematica

Select[Table[Cyclotomic[k, -4], {k, 0, 100}], PrimeQ[#] &]

Crossrefs

Cf. A138926.

Sequence in context: A176555 A237423 A342725 * A257373 A346561 A131019

Adjacent sequences: A292000 A292001 A292002 * A292004 A292005 A292006

Keyword

nonn

Author

Robert Price, Sep 07 2017

Status

approved