This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A230377 #20 Apr 29 2022 03:40:16 %S A230377 1,1,13,113,3541,58367,2826601,19231,113631466919,9617835527609, %T A230377 348275601426959,35522826680397941,241498479121, %U A230377 8403855868042458448127,1161044975606998832441701,1272844589592126671,10128165505710094110937686497,4612290807753604561 %N A230377 The left Aurifeuillian factor of k^k + 1 for k congruent to 0, 2 or 3 (mod 4) and squarefree. %C A230377 The values of k are given by A230375. %C A230377 Named after the French mathematician Léon-François-Antoine Aurifeuille (1822-1882). - _Bernard Schott_, Apr 25 2022 %H A230377 Richard P. Brent, <a href="http://arxiv.org/abs/1004.5466">On computing factors of cyclotomic polynomials</a>, arXiv:1004.5466 [math.NT], 2010. %H A230377 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/AurifeuilleanFactorization.html">Aurifeuillean Factorization</a>. %H A230377 Wikipedia, <a href="https://en.wikipedia.org/wiki/Léon-François-Antoine_Aurifeuille">Léon-François-Antoine Aurifeuille</a>. %H A230377 Wikipedia, <a href="https://en.wikipedia.org/wiki/Aurifeuillean_factorization">Aurifeuillean factorization</a>. %e A230377 58367 is in the sequence because it is an Aurifeuillian factor of 11^11+1. %Y A230377 Cf. A230375, A220983, A220984, A230375, A230376, A230378, A230379. %K A230377 nonn %O A230377 1,3 %A A230377 _Colin Barker_, Oct 17 2013