Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n that have k valleys at level 1.
A114489
Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n that have k valleys at level 1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =1a(5) =9a(6) =4a(7) =1a(8) =22a(9) =14a(10) =5a(11) =1a(12) =58a(13) =46a(14) =21a(15) =6a(16) =1a(17) =163a(18) =149a(19) =80a(20) =29a(21) =7a(22) =1a(23) =483a(24) =484a(25) =292a(26) =124a(27) =38a(28) =8a(29) =1
External references
- oeis: A114489