A360867 Number of unlabeled connected loopless multigraphs with n edges and degree >= 3 at each node.

0, 0, 1, 1, 2, 6, 12, 32, 92, 273, 869, 2989, 10722, 40599

Offset

1,5

Links

Table of n, a(n) for n=1..14.

Formula

Inverse Euler transform of A360869.

Crossrefs

Row sums of A360866.

Cf. A076864, A360863 (loops allowed), A360868, A360869 (not necessarily connected).

Sequence in context: A304961 A032178 A102881 * A217447 A057579 A096610

Adjacent sequences: A360864 A360865 A360866 * A360868 A360869 A360870

Keyword

nonn,more

Author

Andrew Howroyd, Feb 24 2023

Status

approved