OFFSET
1,1
COMMENTS
The values of k are given by A005117, except for the leading 1.
LINKS
Richard P. Brent, On computing factors of cyclotomic polynomials, arXiv:1004.5466 [math.NT], 2010.
EXAMPLE
13993643 is in the sequence because it is an Aurifeuillian factor of 13^13-1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Oct 17 2013
STATUS
approved