Number of isomorphism classes of connected 4-regular loopless multigraphs of order n.
A129417
Number of isomorphism classes of connected 4-regular loopless multigraphs of order n.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =3a(5) =6a(6) =19a(7) =50a(8) =204a(9) =832a(10) =4330a(11) =25227a(12) =171886a(13) =1303725a(14) =10959478a(15) =100230117a(16) =989280132a(17) =10455393155a(18) =117701173970
External references
- oeis: A129417