%I A001188 M1892 N0746
%S A001188 1,2,8,60,672,9953,184557,4142631,109813842,3373122370,118280690398,
%T A001188 4678086540493,206625802351035,10107719377251109,543762148079927802
%N A001188 Number of even graphs with n edges.
%C A001188 a(n) appears to be [A060639(n) + 1] / 2. - Ralf Stephan, Aug 21 2004
%D A001188 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001188 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001188 E. N. Gilbert, Enumeration of labeled graphs, Canad. J. Math., 8 (1956), 
               405-411.
%D A001188 D. G. Cantor, personal communication.
%Y A001188 Sequence in context: A001415 A053871 A052622 this_sequence A113145 A036794 
               A096121
%Y A001188 Adjacent sequences: A001185 A001186 A001187 this_sequence A001189 A001190 
               A001191
%K A001188 nonn
%O A001188 1,2
%A A001188 N. J. A. Sloane (njas(AT)research.att.com).