Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k UUUU's starting at level 0.
A135309
Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k UUUU's starting at level 0.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =1a(6) =36a(7) =6a(8) =105a(9) =27a(10) =319a(11) =110a(12) =1002a(13) =427a(14) =1a(15) =3235a(16) =1616a(17) =11a(18) =10685a(19) =6034a(20) =77a(21) =35970a(22) =22376a(23) =440a(24) =123045a(25) =82725a(26) =2241a(27) =1a(28) =426667a(29) =305606
External references
- oeis: A135309