%I A004100 M2878
%S A004100 0,1,0,3,10,355,6986,297619,15077658,1120452771,111765799882,
%T A004100 15350524923547,2875055248515242,738416821509929731,260316039943139322858,
%U A004100 126430202628042630866787,84814075550928212558332858,78847417416749666369637926851
%N A004100 Number of labeled nonseparable bipartite graphs on n nodes.
%D A004100 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A004100 F. Harary and R. W. Robinson, Labeled bipartite blocks, Canad. J. Math., 
               31 (1979), 60-68.
%D A004100 A. Nymeyer and R. W. Robinson, ``Tabulation of the Numbers of Labeled 
               Bipartite Blocks and Related Classes of Bicolored Graphs,'' unpublished 
               manuscript, 1982.
%D A004100 R. W. Robinson, Numerical implementation of graph counting algorithms, 
               AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1976.
%H A004100 R. W. Robinson, <a href="b004100.txt">Table of n, a(n) for n = 1..32</
               a>
%Y A004100 Sequence in context: A067999 A156193 A119035 this_sequence A103156 A012865 
               A006273
%Y A004100 Adjacent sequences: A004097 A004098 A004099 this_sequence A004101 A004102 
               A004103
%K A004100 nonn,nice,easy
%O A004100 1,4
%A A004100 N. J. A. Sloane (njas(AT)research.att.com).
%E A004100 a(16) onwards added by N. J. A. Sloane (njas(AT)research.att.com), Oct 
               19 2006 from the Robinson reference