Total number of brown nodes among tricolored labeled trees on n nodes.

A097172

Total number of brown nodes among tricolored labeled trees on n nodes.

Terms

    a(0) =3a(1) =4a(2) =185a(3) =1026a(4) =30457a(5) =362664a(6) =10245825a(7) =195060070a(8) =5907674201a(9) =153676400076

External references