%I A003559
%S A003559 1,3,2,3,4,9,5,10,3,15,8,9,4,21,11,21,6,20,14,5,16,11,12,
%T A003559 6,9,39,4,16,10,6,23,24,20,17,26,27,12,44,29,5,15,63,12,
%U A003559 9,16,69,35,14,9,25,30,39,8,81,41,39,21,60,44,45
%N A003559 Least number m such that 3^m = +- 1 mod 3n + 1.
%Y A003559 Sequence in context: A132408 A091821 A086035 this_sequence A064885 A029618 
               A112427
%Y A003559 Adjacent sequences: A003556 A003557 A003558 this_sequence A003560 A003561 
               A003562
%K A003559 nonn
%O A003559 0,2
%A A003559 N. J. A. Sloane (njas(AT)research.att.com).