Total number of interior nodes in all essentially parallel series-parallel networks with n labeled edges, multiple edges not allowed.

A058388

Total number of interior nodes in all essentially parallel series-parallel networks with n labeled edges, multiple edges not allowed.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =3a(4) =14a(5) =195a(6) =2059a(7) =31150a(8) =489012a(9) =9073638a(10) =183490118a(11) =4135560660a(12) =101421574440

External references