Triangle read by rows: T(n,k) is number of Dyck paths of semilength n with height of second peak equal to k (n>=1; 0<=k<=n-1).
A112307
Triangle read by rows: T(n,k) is number of Dyck paths of semilength n with height of second peak equal to k (n>=1; 0<=k<=n-1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =1a(7) =4a(8) =6a(9) =3a(10) =1a(11) =9a(12) =16a(13) =12a(14) =4a(15) =1a(16) =23a(17) =44a(18) =39a(19) =20a(20) =5a(21) =1a(22) =65a(23) =128a(24) =123a(25) =76a(26) =30a(27) =6a(28) =1a(29) =197
External references
- oeis: A112307