Number of connected 3-regular (cubic) multigraphs on 2n unlabeled nodes rooted at an unoriented edge (or loop) whose removal does not disconnect the graph, loops allowed.

A361447

Number of connected 3-regular (cubic) multigraphs on 2n unlabeled nodes rooted at an unoriented edge (or loop) whose removal does not disconnect the graph, loops allowed.

Terms

    a(0) =1a(1) =2a(2) =9a(3) =49a(4) =338a(5) =2744a(6) =26025a(7) =282419a(8) =3463502a(9) =47439030a(10) =718618117a(11) =11937743088a(12) =215896959624

External references