Number of isomorphism classes of 3-regular loopless multigraphs of order 2n.
A129416
Number of isomorphism classes of 3-regular loopless multigraphs of order 2n.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =32a(4) =135a(5) =709a(6) =4637a(7) =38374a(8) =391473a(9) =4764778a(10) =66913591a(11) =1056886475a(12) =18446472265a(13) =351482430368
External references
- oeis: A129416