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A230378
The right Aurifeuillian factor of k^k - 1 for k congruent to 1 (mod 4) and squarefree.
3
71, 13993643, 19152352117, 227633407, 813955076015309926319, 4098986195943739, 46959719470144429555105032871, 491873569944394295636860313807677, 1848593595048531176470116001230356265643249547, 108685909290746311448943506365699
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.
KEYWORD
nonn
AUTHOR
Colin Barker, Oct 17 2013
STATUS
approved