Number of rooted connected graphs on n labeled nodes where the root has degree 2.

A038095

Number of rooted connected graphs on n labeled nodes where the root has degree 2.

Terms

    a(0) =6a(1) =72a(2) =1440a(3) =49680a(4) =2998800a(5) =324237312a(6) =64440883584

External references