Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes whose underlying graph is k-regular, k = 0..n-1.

A350912

Triangle read by rows: T(n,k) is the number of oriented graphs on n unlabeled nodes whose underlying graph is k-regular, k = 0..n-1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =0a(5) =2a(6) =1a(7) =1a(8) =4a(9) =4a(10) =1a(11) =0a(12) =4a(13) =0a(14) =12a(15) =1a(16) =1a(17) =12a(18) =62a(19) =112a(20) =56a(21) =1a(22) =0a(23) =18a(24) =0a(25) =1602a(26) =0a(27) =456a(28) =1a(29) =1

External references