Number of isomorphism classes of 3-regular multigraphs of order 2n, loops allowed.
A129427
Number of isomorphism classes of 3-regular multigraphs of order 2n, loops allowed.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =140a(5) =722a(6) =4439a(7) =32654a(8) =289519a(9) =3054067a(10) =37584620a(11) =527968286a(12) =8308434931a(13) =144345554051
External references
- oeis: A129427