Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having largest descent k, n>=0, 0<=k<=n.
A238128
Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having largest descent k, n>=0, 0<=k<=n.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =2a(4) =0a(5) =0a(6) =3a(7) =1a(8) =0a(9) =0a(10) =5a(11) =4a(12) =1a(13) =0a(14) =0a(15) =7a(16) =13a(17) =5a(18) =1a(19) =0a(20) =0a(21) =11a(22) =37a(23) =21a(24) =6a(25) =1a(26) =0a(27) =0a(28) =15a(29) =100
External references
- oeis: A238128