Number of series-reduced rooted trees whose leaves are {1, 1, 2, 2, 3, 3, ..., n, n}.
A316977
Number of series-reduced rooted trees whose leaves are {1, 1, 2, 2, 3, 3, ..., n, n}.
Terms
- a(0) =1a(1) =12a(2) =575a(3) =66080a(4) =13830706a(5) =4566898564
External references
- oeis: A316977