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%I #9 Jun 25 2017 15:06:13
%S 1,1,19,1111,141289,32283361,11841596779,6461678187511,
%T 4966364015391889
%N Consider the family of multigraphs enriched by the species of even sets. Sequence gives number of those multigraphs with 2n arcs.
%D G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
%H G. Paquin, <a href="/A038205/a038205.pdf">Dénombrement de multigraphes enrichis</a>, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Oct 26 2004