Triangle read by rows: T(n,k) is the number of Dyck n-paths containing k even-length descents to ground level.

A111301

Triangle read by rows: T(n,k) is the number of Dyck n-paths containing k even-length descents to ground level.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =8a(8) =1a(9) =14a(10) =23a(11) =5a(12) =42a(13) =70a(14) =19a(15) =1a(16) =132a(17) =222a(18) =68a(19) =7a(20) =429a(21) =726a(22) =240a(23) =34a(24) =1a(25) =1430a(26) =2431a(27) =847a(28) =145a(29) =9

External references