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A230376 The left Aurifeuillian factor of n^n - 1 for n congruent to 1 mod 4 and squarefree. 2

%I

%S 11,1803647,2699538733,30778903,112663560435723374699,554945667652531,

%T 6243610407478181159725577611,67643278270835231300426724641533,

%U 253382315888712050791030544452181354268272663,14710826638296122001733445931451

%N The left Aurifeuillian factor of n^n - 1 for n congruent to 1 mod 4 and squarefree.

%C The values of n are given by A005117, except for the leading 1.

%H Richard P. Brent, <a href="http://arxiv.org/abs/1004.5466">On computing factors of cyclotomic polynomials</a>

%e 1803647 is in the sequence because it is an Aurifeuillian factor of 13^13-1.

%Y Cf. A005117, A220983, A220984, A230375, A230377-A230379.

%K nonn

%O 1,1

%A _Colin Barker_, Oct 17 2013

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Last modified April 7 10:26 EDT 2020. Contains 333300 sequences. (Running on oeis4.)