Number of labeled trees with n nodes and 2-colored internal (non-leaf) nodes.

A052317

Number of labeled trees with n nodes and 2-colored internal (non-leaf) nodes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =6a(4) =56a(5) =730a(6) =12372a(7) =259574a(8) =6511920a(9) =190413234a(10) =6364960940a(11) =239556803662

External references