%I A003571
%S A003571 2,6,4,3,4,18,5,20,6,30,16,18,4,42,11,42,6,20,28,10,16,
%T A003571 22,12,12,18,78,8,16,10,6,23,48,20,34,52,27,12,44,29,5,
%U A003571 30,126,12,18,16,138,35,28,18,50,30,78,8,162,41,39,42,60
%N A003571 Order of 3 mod 3n+1.
%p A003571 with(numtheory): f := n->order(3,3*n+1);
%Y A003571 Sequence in context: A074382 A061350 A046276 this_sequence A068457 A102510 
               A100115
%Y A003571 Adjacent sequences: A003568 A003569 A003570 this_sequence A003572 A003573 
               A003574
%K A003571 nonn
%O A003571 1,1
%A A003571 N. J. A. Sloane (njas(AT)research.att.com).