Number of trees on n labeled nodes: n^(n-2) with a(0)=1.

A000272

Number of trees on n labeled nodes: n^(n-2) with a(0)=1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =16a(5) =125a(6) =1296a(7) =16807a(8) =262144a(9) =4782969a(10) =100000000a(11) =2357947691a(12) =61917364224

External references