Array read by antidiagonals: T(n,k) is the number of unlabeled oriented k-gonal 2-trees with n oriented polygons, n >= 0, k >= 2.
A340812
Array read by antidiagonals: T(n,k) is the number of unlabeled oriented 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) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =1a(11) =1a(12) =1a(13) =2a(14) =3a(15) =1a(16) =1a(17) =1a(18) =3a(19) =7a(20) =6a(21) =1a(22) =1a(23) =1a(24) =3a(25) =11a(26) =18a(27) =11a(28) =1a(29) =1
External references
- oeis: A340812