Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k UDDU's starting at level 1.
A135328
Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k UDDU's starting at level 1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =1a(5) =10a(6) =4a(7) =29a(8) =12a(9) =1a(10) =90a(11) =36a(12) =6a(13) =290a(14) =114a(15) =24a(16) =1a(17) =960a(18) =376a(19) =86a(20) =8a(21) =3246a(22) =1272a(23) =303a(24) =40a(25) =1a(26) =11164a(27) =4380a(28) =1074a(29) =168
External references
- oeis: A135328