Number of directed 3-regular graphs on n nodes.

A219890

Number of directed 3-regular graphs on n nodes.

Terms

    a(0) =1a(1) =2a(2) =23a(3) =415a(4) =19041a(5) =1104045a(6) =79818336a(7) =6958257941a(8) =720814138673

External references