Total number of interior nodes in all essentially parallel series-parallel networks with n labeled edges, multiple edges allowed.

A058479

Total number of interior nodes in all essentially parallel series-parallel networks with n labeled edges, multiple edges allowed.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =3a(4) =32a(5) =410a(6) =6164a(7) =107492a(8) =2140368a(9) =47990784a(10) =1197523456a(11) =32930028736a(12) =989647215424

External references