OFFSET
1,1
COMMENTS
The values of k are given by A230375.
LINKS
Richard P. Brent, On computing factors of cyclotomic polynomials
EXAMPLE
407353 is in the sequence because it is an Aurifeuillian factor of 11^11+1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Oct 17 2013
STATUS
approved