The number of unlabeled binary trees that contain n distinct subtrees, where a subtree means take any node and everything below that node.
A254789
The number of unlabeled binary trees that contain n distinct subtrees, where a subtree means take any node and everything below that node.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =15a(4) =111a(5) =1119a(6) =14487a(7) =230943a(8) =4395855a(9) =97608831a(10) =2482988079a(11) =71321533887
External references
- oeis: A254789