Array read by antidiagonals: T(n,k) is the number of color patterns (set partitions) in an oriented cycle of length n using k or fewer colors (subsets).

A320747

Array read by antidiagonals: T(n,k) is the number of color patterns (set partitions) in an oriented cycle of length n using k or fewer colors (subsets).

Terms

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

External references