|
| |
|
|
A258355
|
|
Numbers n such that cyclotomic polynomial value Phi(9,n!) is prime.
|
|
0
|
| |
|
|
|
OFFSET
|
1,3
|
|
|
COMMENTS
|
All values correspond to certified primes.
a(6) > 5944.
|
|
|
LINKS
|
Table of n, a(n) for n=1..5.
|
|
|
EXAMPLE
|
2 is in the sequence because Phi(9,2!) = 1 + 2^3 + 2^6 = 73 is prime.
|
|
|
MATHEMATICA
|
Select[Range[0, 5944], PrimeQ[Cyclotomic[9, #!]] &]
|
|
|
CROSSREFS
|
Cf. A002981, A002982, A046029, A200906.
Sequence in context: A173837 A351447 A036901 * A304423 A316278 A305957
Adjacent sequences: A258352 A258353 A258354 * A258356 A258357 A258358
|
|
|
KEYWORD
|
nonn,more
|
|
|
AUTHOR
|
Robert Price, May 27 2015
|
|
|
STATUS
|
approved
|
| |
|
|
