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Number of unlabeled multigraphs with n edges and degree >= 3 at each node, loops allowed.
2

%I #4 Feb 24 2023 21:46:50

%S 0,1,3,6,16,48,130,403,1293,4346,15318,56604,217802,873022

%N Number of unlabeled multigraphs with n edges and degree >= 3 at each node, loops allowed.

%F Euler transform of A360863.

%Y Cf. A360863 (connected).

%K nonn,more

%O 1,3

%A _Andrew Howroyd_, Feb 24 2023