Number of labeled rooted trees where each node at height h has 0 or h+1 children.
A075533
Number of labeled rooted trees where each node at height h has 0 or h+1 children.
Terms
- a(0) =1a(1) =2a(2) =0a(3) =12a(4) =0a(5) =0a(6) =840a(7) =0a(8) =0a(9) =50400a(10) =831600a(11) =0a(12) =0a(13) =302702400a(14) =1135134000a(15) =14529715200a(16) =0
External references
- oeis: A075533