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A250185 Numbers n such that Phi(34,n) is prime, where Phi is the cyclotomic polynomial. 18
2, 7, 13, 17, 19, 41, 48, 58, 59, 66, 86, 129, 133, 139, 143, 146, 149, 166, 167, 231, 268, 270, 299, 328, 359, 387, 397, 408, 469, 523, 527, 534, 541, 553, 555, 569, 582, 583, 600, 608, 634, 664, 667, 672, 673, 709, 714, 720, 725, 733, 746, 759, 776, 802, 808, 822, 860, 870, 877, 892, 896, 902, 911, 962, 970, 975, 1034, 1050, 1051, 1082 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[2000], PrimeQ[(#^17 + 1) / (# + 1)] &] (*  Vincenzo Librandi, Jan 15 2015 *)

PROG

(MAGMA) [n: n in [1..2000]| IsPrime((n^17+1) div (n+1))]; // Vincenzo Librandi, Jan 15 2015

(PARI) is(n)=isprime(polcyclo(34, n)) \\ Charles R Greathouse IV, Sep 08 2015

CROSSREFS

Cf. A246392.

Sequence in context: A138645 A191060 A166246 * A063206 A063099 A065509

Adjacent sequences:  A250182 A250183 A250184 * A250186 A250187 A250188

KEYWORD

nonn

AUTHOR

R. J. Mathar, Jan 12 2015

STATUS

approved

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Last modified April 18 10:08 EDT 2021. Contains 343087 sequences. (Running on oeis4.)