%I A007596 M1302
%S A007596 1,2,4,44,164,616
%N A007596 N-free graphs.
%D A007596 P. J. Cameron, Some treelike objects, Quart. J. Math. Oxford, 38 (1987), 
               155-183.
%D A007596 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A007596 Sequence in context: A018317 A059794 A141142 this_sequence A050588 A105282 
               A018325
%Y A007596 Adjacent sequences: A007593 A007594 A007595 this_sequence A007597 A007598 
               A007599
%K A007596 nonn,nice,easy,more
%O A007596 0,2
%A A007596 N. J. A. Sloane (njas(AT)research.att.com).