a(n) is the number of noncrossing path sets on 3*n nodes up to rotation and reflection with each path having exactly 3 nodes.
A303330
a(n) is the number of noncrossing path sets on 3*n nodes up to rotation and reflection with each path having exactly 3 nodes.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =22a(4) =201a(5) =2244a(6) =29096a(7) =404064a(8) =5915838a(9) =89918914a(10) =1408072452a(11) =22585364697a(12) =369552118682
External references
- oeis: A303330