Triangle read by rows: T(n,k) is the number of digraphs on n unlabeled unisolated nodes with k arcs, k = 0..n*(n-1).

A350908

Triangle read by rows: T(n,k) is the number of digraphs on n unlabeled unisolated nodes with k arcs, k = 0..n*(n-1).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =1a(4) =0a(5) =0a(6) =3a(7) =4a(8) =4a(9) =1a(10) =1a(11) =0a(12) =0a(13) =1a(14) =9a(15) =23a(16) =37a(17) =47a(18) =38a(19) =27a(20) =13a(21) =5a(22) =1a(23) =1a(24) =0a(25) =0a(26) =0a(27) =3a(28) =34a(29) =116

External references