Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k LDU's (n >= 0; 0 <= k <= floor((n-1)/3) for n >= 1).
A128735
Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k LDU's (n >= 0; 0 <= k <= floor((n-1)/3) for n >= 1).
Terms
- a(0) =1a(1) =3a(2) =10a(3) =35a(4) =1a(5) =127a(6) =10a(7) =474a(8) =69a(9) =1810a(10) =406a(11) =3a(12) =7043a(13) =2193a(14) =49a(15) =27839a(16) =11252a(17) =496a(18) =111503a(19) =55858a(20) =3996a(21) =12a(22) =451640a(23) =271206a(24) =28120a(25) =270a(26) =1847032a(27) =1296584a(28) =181027a(29) =3575
External references
- oeis: A128735