Number of rooted trees with n nodes colored using exactly 2 colors.

A339642

Number of rooted trees with n nodes colored using exactly 2 colors.

Terms

    a(0) =0a(1) =2a(2) =10a(3) =44a(4) =196a(5) =876a(6) =4020a(7) =18766a(8) =89322a(9) =431758a(10) =2116220a(11) =10494080a(12) =52569504a(13) =265647586a(14) =1352621168a(15) =6933127446a(16) =35745747902a(17) =185256755454a(18) =964575991660

External references