Number of unrooted directed trees on n nodes with a green root.

A097631

Number of unrooted directed trees on n nodes with a green root.

Terms

    a(0) =0a(1) =1a(2) =5a(3) =58a(4) =907a(5) =19046a(6) =496869a(7) =15578130a(8) =570573623a(9) =23929861102

External references