Triangular array read by rows. T(n,k) is the number of Green's H-classes of rank k in the semigroup of partial transformations, n >= 0, 0 <= k <= n.
A363849
Triangular array read by rows. T(n,k) is the number of Green's H-classes of rank k in the semigroup of partial transformations, n >= 0, 0 <= k <= n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =21a(8) =18a(9) =1a(10) =1a(11) =60a(12) =150a(13) =40a(14) =1a(15) =1a(16) =155a(17) =900a(18) =650a(19) =75a(20) =1a(21) =1a(22) =378a(23) =4515a(24) =7000a(25) =2100a(26) =126a(27) =1a(28) =1a(29) =889
External references
- oeis: A363849