|
| |
|
|
A250178
|
|
Numbers k such that Phi_22(k) is prime, where Phi is the cyclotomic polynomial.
|
|
19
|
|
|
|
2, 6, 12, 13, 23, 24, 26, 35, 62, 69, 91, 105, 147, 160, 163, 183, 185, 193, 229, 232, 233, 236, 248, 262, 269, 280, 294, 303, 315, 330, 376, 394, 426, 430, 440, 464, 469, 491, 492, 508, 537, 625, 629, 647, 653, 666, 752, 772, 775, 786, 788, 832, 840, 852, 854, 855, 859, 905, 922, 972, 993, 998
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Numbers k such that (k^11+1)/(k+1) is a prime. - Vincenzo Librandi, May 21 2018
|
|
|
LINKS
|
G. C. Greubel, Table of n, a(n) for n = 1..10000
|
|
|
MATHEMATICA
|
a250178[n_] := Select[Range[n], PrimeQ@Cyclotomic[22, #] &]; a250178[1000] (* Michael De Vlieger, Dec 25 2014 *)
|
|
|
PROG
|
(PARI) isok(n) = isprime(polcyclo(22, n)); \\ Michel Marcus, Sep 29 2015
(Magma) [n: n in [1..1000]| IsPrime((n^11+1) div (n+1))]; // Vincenzo Librandi, May 21 2018
|
|
|
CROSSREFS
|
See A250177 for references.
Sequence in context: A152667 A145892 A216429 * A154712 A079849 A260907
Adjacent sequences: A250175 A250176 A250177 * A250179 A250180 A250181
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Eric Chen, Dec 24 2014
|
|
|
STATUS
|
approved
|
| |
|
|
