A230378 The right Aurifeuillian factor of k^k - 1 for k congruent to 1 (mod 4) and squarefree.

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

Table of n, a(n) for n=1..10.

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

Cf. A005117, A220983, A220984, A230375-A230377, A230376.

Sequence in context: A144242 A144360 A350005 * A352732 A093176 A332841

Adjacent sequences: A230375 A230376 A230377 * A230379 A230380 A230381

Keyword

nonn

Author

Colin Barker, Oct 17 2013

Status

approved