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 A230379 #13 Mar 30 2022 22:43:37 %S A230379 5,7,97,911,27961,407353,19955461,142111,870542161121,73194743542229, %T A230379 2498077661567473,255982845098719961,1784464680181, %U A230379 63472256064447557254913,8751868368432861971645641,9227671631659104191,73515350937824503550370503117,34089603477374212561 %N A230379 The right Aurifeuillian factor of k^k + 1 for k congruent to 0, 2 or 3 (mod 4) and squarefree. %C A230379 The values of k are given by A230375. %H A230379 Richard P. Brent, <a href="http://arxiv.org/abs/1004.5466">On computing factors of cyclotomic polynomials</a> %e A230379 407353 is in the sequence because it is an Aurifeuillian factor of 11^11+1. %K A230379 nonn %O A230379 1,1 %A A230379 _Colin Barker_, Oct 17 2013