Number of connected labeled 2-regular oriented graphs with n nodes.
A007110
Number of connected labeled 2-regular oriented graphs with n nodes.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =24a(6) =570a(7) =27900a(8) =1827630a(9) =152031600a(10) =15453811800
External references
- oeis: A007110