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A250194 Numbers n such that Phi(48,n) is prime, where Phi is the cyclotomic polynomial. 2
5, 7, 10, 16, 17, 39, 41, 51, 55, 70, 96, 97, 104, 132, 136, 137, 148, 182, 195, 206, 216, 227, 234, 236, 245, 262, 267, 278, 283, 287, 305, 310, 331, 361, 362, 380, 384, 409, 410, 411, 423, 438, 446, 464, 473, 495, 522, 549, 561, 564, 578, 587, 591, 592, 602, 619, 622, 633, 665, 679, 687, 714, 741, 759, 777 (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[800], PrimeQ[Cyclotomic[48, #]] &] (* Vincenzo Librandi, Jan 17 2015 *)

PROG

(PARI) {is(n)=isprime(polcyclo(48, n))};

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

CROSSREFS

Cf. A246392.

Sequence in context: A196936 A188196 A048584 * A314293 A073895 A320447

Adjacent sequences:  A250191 A250192 A250193 * A250195 A250196 A250197

KEYWORD

nonn

AUTHOR

R. J. Mathar, Jan 12 2015

STATUS

approved

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Last modified September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)