Triangle read by rows: T(n,k) is the number of nondecreasing Dyck paths of semilength n and having k double rises at an odd level (n >= 1, k >= 0).
A121529
Triangle read by rows: T(n,k) is the number of nondecreasing Dyck paths of semilength n and having k double rises at an odd level (n >= 1, k >= 0).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =10a(7) =2a(8) =1a(9) =19a(10) =14a(11) =1a(12) =33a(13) =50a(14) =5a(15) =1a(16) =55a(17) =132a(18) =45a(19) =1a(20) =90a(21) =301a(22) =205a(23) =13a(24) =1a(25) =146a(26) =631a(27) =680a(28) =139a(29) =1
External references
- oeis: A121529