Triangle read by rows: T(n,k) is the number of descent sequences of length n with exactly k-1 descents, n>=1, 1<=k<=n.
A225624
Triangle read by rows: T(n,k) is the number of descent sequences of length n with exactly k-1 descents, n>=1, 1<=k<=n.
Terms
- a(0) =1a(1) =2a(2) =0a(3) =3a(4) =1a(5) =0a(6) =4a(7) =5a(8) =0a(9) =0a(10) =5a(11) =15a(12) =3a(13) =0a(14) =0a(15) =6a(16) =35a(17) =25a(18) =1a(19) =0a(20) =0a(21) =7a(22) =70a(23) =117a(24) =28a(25) =0a(26) =0a(27) =0a(28) =8a(29) =126
External references
- oeis: A225624