%I A052450
%S A052450 0,1,2,6,13,37,106,409,1896,12171
%N A052450 Number of n-node simple graphs having clique number 2.
%H A052450 Keith M. Briggs, <a href="http://keithbriggs.info/cgt.html">Combinatorial 
               Graph Theory</a>
%H A052450 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               CliqueNumber.html">Link to a section of The World of Mathematics.</
               a>
%Y A052450 Cf. A052451, A052452, A052453, A077392, A077393, A077394.
%Y A052450 Sequence in context: A162057 A026550 A124124 this_sequence A001373 A057243 
               A012470
%Y A052450 Adjacent sequences: A052447 A052448 A052449 this_sequence A052451 A052452 
               A052453
%K A052450 nonn,more
%O A052450 1,3
%A A052450 Eric Weisstein (eric(AT)weisstein.com)
%E A052450 2 more terms from Eric Weisstein (eric(AT)weisstein.com), Nov 03 2002
%E A052450 a(10) from Keith Briggs, Mar 15 2006