%I A131649
%S A131649 4,8,16,32,54,82,116,156,202,254,312,376,446,522,604
%N A131649 Number of distinct improper 2-coloring of edges for odd-order cyclic 
               graphs.
%t A131649 Table[If[n == 3, n + 1, If[n == 5, n + 3, 1/2 (13 - 5 n) + 3/4 (-1 + 
               n)^2]], {n, 3, 31, 2}]
%Y A131649 Sequence in context: A088259 A123857 A048168 this_sequence A003199 A007096 
               A036313
%Y A131649 Adjacent sequences: A131646 A131647 A131648 this_sequence A131650 A131651 
               A131652
%K A131649 nonn
%O A131649 3,1
%A A131649 M. Razid Black (mrazidblack(AT)hotmail.com), Sep 10 2007