The number of unlabeled connected 4 regular multigraphs on n nodes with 4 external legs, loops allowed.
A361698
The number of unlabeled connected 4 regular multigraphs on n nodes with 4 external legs, loops allowed.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =37a(5) =181a(6) =1010a(7) =6135a(8) =40893a(9) =295753a(10) =2317683a(11) =19568427a(12) =177397551a(13) =1719790643a(14) =17767328745a(15) =194954224643
External references
- oeis: A361698