Number of unlabeled digraphs on n vertices such that every vertex has outdegree 2.

A129524

Number of unlabeled digraphs on n vertices such that every vertex has outdegree 2.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =6a(4) =79a(5) =1499a(6) =35317a(7) =967255a(8) =29949217a(9) =1033242585a(10) =39323062014

External references