Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k hills (i.e., peaks at level 1) (0 <= k <= n).
A128722
Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k hills (i.e., peaks at level 1) (0 <= k <= n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =0a(5) =1a(6) =6a(7) =3a(8) =0a(9) =1a(10) =22a(11) =9a(12) =4a(13) =0a(14) =1a(15) =84a(16) =35a(17) =12a(18) =5a(19) =0a(20) =1a(21) =334a(22) =138a(23) =49a(24) =15a(25) =6a(26) =0a(27) =1a(28) =1368a(29) =563
External references
- oeis: A128722