%I A007687 M2833
%S A007687 3,10,21,44,83
%N A007687 Number of 4-colorings of cyclic group of order n.
%D A007687 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007687 R. Haas, Three-colorings of finite groups or an algebra of nonequalities, 
               Math. Mag., 63 (1990), 211-225.
%Y A007687 Sequence in context: A027917 A038347 A117495 this_sequence A006308 A008837 
               A081950
%Y A007687 Adjacent sequences: A007684 A007685 A007686 this_sequence A007688 A007689 
               A007690
%K A007687 nonn
%O A007687 1,1
%A A007687 N. J. A. Sloane (njas(AT)research.att.com).