Number of ordered trees with n+1 leaves, no node of outdegree 1, and having as many leaves marked as the number of nodes of outdegree greater than 1.
A368178
Number of ordered trees with n+1 leaves, no node of outdegree 1, and having as many leaves marked as the number of nodes of outdegree greater than 1.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =54a(4) =375a(5) =2848a(6) =22981a(7) =193742a(8) =1688427a(9) =15101778a(10) =137930199a(11) =1281629088a(12) =12081441411a(13) =115288530516
External references
- oeis: A368178