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A098625 Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n loops and edges. 3

%I

%S 1,0,2,4,39,228,2400,23616,307692,4197408,67658769,1174316570,

%T 22916090131,482946085932

%N Consider the family of multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n loops and edges.

%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

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Last modified October 24 20:35 EDT 2021. Contains 348233 sequences. (Running on oeis4.)