Number of rooted labeled triangular cacti with 2n+1 nodes (n triangles).

A034940

Number of rooted labeled triangular cacti with 2n+1 nodes (n triangles).

Terms

    a(0) =1a(1) =3a(2) =75a(3) =5145a(4) =688905a(5) =152193195a(6) =50174679555

External references