Triangle T(n,r) read by rows: order of the semigroup of orientation-preserving partial transformations of n elements with breath r.
A289710
Triangle T(n,r) read by rows: order of the semigroup of orientation-preserving partial transformations of n elements with breath r.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =4a(6) =1a(7) =9a(8) =27a(9) =24a(10) =1a(11) =16a(12) =96a(13) =208a(14) =128a(15) =1a(16) =25a(17) =250a(18) =950a(19) =1325a(20) =610a(21) =1a(22) =36a(23) =540a(24) =3120a(25) =7290a(26) =7416a(27) =2742a(28) =1a(29) =49
External references
- oeis: A289710