Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having k largest parts, n >= k >= 0.
A238123
Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having k largest parts, n >= k >= 0.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =3a(8) =0a(9) =1a(10) =0a(11) =7a(12) =2a(13) =0a(14) =1a(15) =0a(16) =20a(17) =5a(18) =0a(19) =0a(20) =1a(21) =0a(22) =56a(23) =14a(24) =5a(25) =0a(26) =0a(27) =1a(28) =0a(29) =182
External references
- oeis: A238123