Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n, having no ascents and no descents of length 1, and having k UUDD's starting at level 0.
A166299
Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n, having no ascents and no descents of length 1, and having k UUDD's starting at level 0.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =0a(8) =1a(9) =2a(10) =2a(11) =0a(12) =5a(13) =2a(14) =0a(15) =1a(16) =10a(17) =4a(18) =3a(19) =0a(20) =22a(21) =11a(22) =3a(23) =0a(24) =1a(25) =50a(26) =22a(27) =6a(28) =4a(29) =0
External references
- oeis: A166299