Number of connected chord diagrams of degree n.
A018225
Number of connected chord diagrams of degree n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =31a(5) =255a(6) =2788a(7) =37333a(8) =578799a(9) =10134071a(10) =197394232a(11) =4231417728a(12) =98991987830
External references
- oeis: A018225