A360863 Number of unlabeled connected multigraphs with n edges and degree >= 3 at each node, loops allowed.
0, 1, 3, 5, 13, 36, 99, 301, 980, 3345, 12036, 45399, 178420, 729149
Offset: 1
Formula
Inverse Euler transform of A360865.
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.