Number of non-nesting digraphs with vertices {1..n}, where two edges (a,b), (c,d) are nesting if a < c and b > d or a > c and b < d.
A326237
Number of non-nesting digraphs with vertices {1..n}, where two edges (a,b), (c,d) are nesting if a < c and b > d or a > c and b < d.
Terms
- a(0) =1a(1) =2a(2) =12a(3) =104a(4) =1008a(5) =10272a(6) =107712a(7) =1150592
External references
- oeis: A326237