Number of alternating link diagrams with n crossings, 2 connected components and two external legs.
A067767
Number of alternating link diagrams with n crossings, 2 connected components and two external legs.
Terms
- a(0) =4a(1) =90a(2) =1349a(3) =17220a(4) =203568a(5) =2312094a(6) =25691670a(7) =282000444a(8) =3074136464a(9) =33387698708a(10) =361969672904
External references
- oeis: A067767