Number of isomorphism classes of connected 3-regular multigraphs of order 2n, loops allowed.

A005967

Number of isomorphism classes of connected 3-regular multigraphs of order 2n, loops allowed.

Terms

    a(0) =2a(1) =5a(2) =17a(3) =71a(4) =388a(5) =2592a(6) =21096a(7) =204638a(8) =2317172a(9) =30024276a(10) =437469859a(11) =7067109598a(12) =125184509147

External references