Number of labeled rooted trees on [n] that have a primary branch.

A356259

Number of labeled rooted trees on [n] that have a primary branch.

Terms

    a(0) =0a(1) =2a(2) =6a(3) =60a(4) =500a(5) =7290a(6) =100842a(7) =1978368a(8) =38263752a(9) =949218750a(10) =23579476910a(11) =709026379776

External references