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!)
A258356 Numbers n such that cyclotomic polynomial value Phi(10,n!) is prime. 0
2, 36, 101, 107, 267, 316 (list; graph; refs; listen; history; text; internal format)
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

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 April 11 15:49 EDT 2021. Contains 342886 sequences. (Running on oeis4.)