Square array whose entry A(n,k) is the number of labeled rooted trees on a set of size n where each node has at most k neighbors that are further away from the root than the node itself, for n >= 0, k >= 0, read by descending antidiagonals.
A325201
Square array whose entry A(n,k) is the number of labeled rooted trees on a set of size n where each node has at most k neighbors that are further away from the root than the node itself, for n >= 0, k >= 0, read by descending antidiagonals.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =1a(8) =2a(9) =0a(10) =0a(11) =1a(12) =2a(13) =6a(14) =0a(15) =0a(16) =1a(17) =2a(18) =9a(19) =24a(20) =0a(21) =0a(22) =1a(23) =2a(24) =9a(25) =60a(26) =120a(27) =0a(28) =0a(29) =1
External references
- oeis: A325201