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A250192 Numbers n such that Phi(45,n) is prime, where Phi is the cyclotomic polynomial. 2
11, 18, 23, 24, 29, 33, 40, 51, 61, 65, 85, 91, 95, 113, 153, 206, 207, 218, 264, 276, 285, 292, 313, 332, 347, 362, 367, 391, 417, 418, 424, 426, 428, 439, 444, 451, 454, 468, 476, 493, 542, 601, 634, 642, 653, 657, 680, 705, 734, 764, 783, 787, 856, 867, 873, 915, 942, 945, 953, 964, 971, 1013, 1022, 1044, 1054, 1058, 1070 (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[1000], PrimeQ[Cyclotomic[45, #]] &] (* Vincenzo Librandi, Jan 16 2015 *)

PROG

(PARI) {is(n)=isprime(polcyclo(45, n))};

for(n=1, 1000, if(is(n)==1, print1(n, ", "))) \\ G. C. Greubel, May 18 2018

CROSSREFS

Cf. A246392.

Sequence in context: A287868 A095648 A273679 * A250217 A335278 A151748

Adjacent sequences:  A250189 A250190 A250191 * A250193 A250194 A250195

KEYWORD

nonn

AUTHOR

R. J. Mathar, Jan 12 2015

STATUS

approved

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Last modified September 19 08:05 EDT 2021. Contains 347556 sequences. (Running on oeis4.)