login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A250184 Numbers n such that Phi(33,n) is prime, where Phi is the cyclotomic polynomial. 2
2, 3, 13, 14, 18, 31, 44, 59, 62, 75, 80, 104, 109, 145, 185, 213, 273, 282, 309, 321, 337, 379, 399, 405, 411, 430, 452, 464, 470, 522, 535, 560, 566, 586, 593, 597, 653, 654, 688, 702, 704, 727, 728, 744, 746, 780, 805, 806, 816, 822, 829, 846, 856 (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[900], PrimeQ[Cyclotomic[33, #]] &] (* Vincenzo Librandi, Jan 17 2015 *)

PROG

(PARI) isok(n) = isprime(polcyclo(30, n)); \\ Michel Marcus, Jan 17 2015

CROSSREFS

Cf. A246392.

Sequence in context: A056445 A171483 A100385 * A128460 A273617 A101541

Adjacent sequences:  A250181 A250182 A250183 * A250185 A250186 A250187

KEYWORD

nonn

AUTHOR

R. J. Mathar, Jan 12 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 19 15:03 EDT 2021. Contains 345141 sequences. (Running on oeis4.)