Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k DUUU's starting at level 1.
A135331
Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k DUUU's starting at level 1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =1a(6) =36a(7) =6a(8) =105a(9) =27a(10) =320a(11) =108a(12) =1a(13) =1011a(14) =409a(15) =10a(16) =3289a(17) =1508a(18) =65a(19) =10957a(20) =5491a(21) =347a(22) =1a(23) =37216a(24) =19898a(25) =1658a(26) =14a(27) =128435a(28) =72063a(29) =7395
External references
- oeis: A135331