Number of trivalent planar loopless multigraphs with 2n nodes.

A005966

Number of trivalent planar loopless multigraphs with 2n nodes.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =17a(4) =71a(5) =357a(6) =2143a(7) =14960a(8) =116560a(9) =986983a(10) =8874072

External references