%I #2 Mar 30 2012 18:49:09
%S 1,1,2,5,18,78,522,6168,137352,6002584,509498932,82545585936,
%T 25251015686776,14527077828617744,15713242984902154384,
%U 32000507852263778595584,122967932076766466347469888
%N Number of unlabeled graphs with n nodes and an odd sum of nodes and edges.
%C a(n) = A054960(n) for even n and A007869(n) for odd n.
%Y Cf. A054960 Number of unlabeled graphs with n nodes and an odd number of edges. A007869 Complementary pairs of graphs on n nodes. Also unlabeled graphs with n nodes and an even number of edges.
%K nonn
%O 1,3
%A _Tanya Khovanova_, Apr 29 2008