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A292003
Primes of the form Phi(k, -4), where Phi is the cyclotomic polynomial.
1
13, 17, 257, 241, 65537, 61681, 15790321, 4278255361, 4562284561, 291280009243618888211558641, 18446744069414584321, 78919881726271091143763623681, 84179842077657862011867889681, 20988936657440586486151264256610222593863921, 84159375948762099254554456081
OFFSET
1,1
MATHEMATICA
Select[Table[Cyclotomic[k, -4], {k, 0, 100}], PrimeQ[#] &]
CROSSREFS
Cf. A138926.
Sequence in context: A176555 A237423 A342725 * A257373 A346561 A131019
KEYWORD
nonn
AUTHOR
Robert Price, Sep 07 2017
STATUS
approved