

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



