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 A003574 #21 Oct 03 2022 02:59:23 %S A003574 1,3,5,2,9,11,9,5,6,6,7,23,4,10,29,3,33,35,10,39,41,14,6,18,15,51,53, %T A003574 18,22,12,10,7,65,18,69,30,21,15,10,26,81,83,9,30,89,30,20,95,6,99,42, %U A003574 33,105,14,9,37,113,15,46,119 %N A003574 Order of 4 mod 4n-1. %H A003574 Muniru A Asiru, <a href="/A003574/b003574.txt">Table of n, a(n) for n = 1..10000</a> %F A003574 a(n) = A053447(2*n-1) for n >= 1. - _Jianing Song_, Oct 03 2022 %p A003574 with(numtheory): f := n->order(4,4*n-1); %o A003574 (GAP) List([1..70],n->OrderMod(4,4*n-1)); # _Muniru A Asiru_, Feb 19 2019 %o A003574 (PARI) a(n) = znorder(Mod(4, 4*n-1)); \\ _Michel Marcus_, Feb 22 2019 %Y A003574 Cf. A003573. Second bisection of A053447. %Y A003574 Cf. A002326, A003572, A217852. %K A003574 nonn %O A003574 1,2 %A A003574 _N. J. A. Sloane_