Number of nodes at n-th level in tree in which top node is 1; each node k has children labeled 1, 2, ..., k*(k+1) at next level.
A147794
Number of nodes at n-th level in tree in which top node is 1; each node k has children labeled 1, 2, ..., k*(k+1) at next level.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =120a(4) =40456a(5) =14354709112
External references
- oeis: A147794