Number of directed rooted trees on n nodes with forbidden limbs.

A014276

Number of directed rooted trees on n nodes with forbidden limbs.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =15a(4) =82a(5) =495a(6) =3144a(7) =20874a(8) =142766a(9) =1000083a(10) =7136463a(11) =51699614a(12) =379214625a(13) =2810720045a(14) =21018835670a(15) =158389275075

External references