Number of unrooted labeled binary trees satisfying a path-length criterion concerning three labeled leaves.
A354690
Number of unrooted labeled binary trees satisfying a path-length criterion concerning three labeled leaves.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =54a(4) =468a(5) =4950a(6) =62640a(7) =920430a(8) =15373260a(9) =287746830a(10) =5965860600a(11) =135691860150
External references
- oeis: A354690