Triangle T(n,k) read by rows: the number of semigroups of orientation-preserving partial transformations on n element with right waist k.
A289714
Triangle T(n,k) read by rows: the number of semigroups of orientation-preserving partial transformations on n element with right waist k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =5a(6) =1a(7) =7a(8) =19a(9) =34a(10) =1a(11) =15a(12) =63a(13) =135a(14) =235a(15) =1a(16) =31a(17) =191a(18) =471a(19) =911a(20) =1556a(21) =1a(22) =63a(23) =543a(24) =1503a(25) =3183a(26) =5883a(27) =9969a(28) =1a(29) =127
External references
- oeis: A289714