Triangle read by rows: number of Dyck paths of semilength n with k peaks after the first return (0 <= k < n).
A101975
Triangle read by rows: number of Dyck paths of semilength n with k peaks after the first return (0 <= k < n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =1a(6) =5a(7) =4a(8) =4a(9) =1a(10) =14a(11) =9a(12) =11a(13) =7a(14) =1a(15) =42a(16) =23a(17) =27a(18) =28a(19) =11a(20) =1a(21) =132a(22) =65a(23) =66a(24) =87a(25) =62a(26) =16a(27) =1a(28) =429a(29) =197
External references
- oeis: A101975