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A098627 Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n arcs. 0

%I

%S 1,0,1,2,27,164,2335,25458,437241,6965112,145640817,3057675290,

%T 76814951587,2003471245164

%N Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n 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,more

%O 0,4

%A _N. J. A. Sloane_, Oct 26 2004

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Last modified April 4 21:43 EDT 2020. Contains 333238 sequences. (Running on oeis4.)