Array read by antidiagonals: T(n,k) is the number of unlabeled oriented edge-rooted k-gonal 2-trees with n oriented polygons, n >= 0, k >= 2.

A340814

Array read by antidiagonals: T(n,k) is the number of unlabeled oriented edge-rooted k-gonal 2-trees with n oriented polygons, n >= 0, k >= 2.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =1a(8) =3a(9) =4a(10) =1a(11) =1a(12) =4a(13) =10a(14) =9a(15) =1a(16) =1a(17) =5a(18) =19a(19) =39a(20) =20a(21) =1a(22) =1a(23) =6a(24) =31a(25) =107a(26) =160a(27) =48a(28) =1a(29) =1

External references