

A258356


Numbers n such that cyclotomic polynomial value Phi(10,n!) is prime.


0




OFFSET

1,1


COMMENTS

All values except 2 are probable primes.
a(7) > 7560.
That is, numbers n such that n! belongs to A246392.  Michel Marcus, May 30 2015


LINKS

Table of n, a(n) for n=1..6.


EXAMPLE

2 is in the sequence because Phi(10,2!) = 1  2 + 2^2  2^3 + 2^4 = 11 is prime.


MATHEMATICA

Select[Range[0, 7560], PrimeQ[Cyclotomic[10, #!]] &]


CROSSREFS

Cf. A002981, A002982, A046029, A200906.
Sequence in context: A187298 A069067 A278930 * A145450 A196558 A187509
Adjacent sequences: A258353 A258354 A258355 * A258357 A258358 A258359


KEYWORD

nonn,more


AUTHOR

Robert Price, May 27 2015


STATUS

approved



