67684

Appears in sequences

• Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k up steps starting at even heights.at n=48A101919
• Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k up steps starting at an odd height.at n=38A101920
• Triangle read by rows: T(n,k) is number of ordered trees with n edges and having exactly k vertices all of whose children are leaves (1<=k<=floor(n/2) for n>=2).at n=33A114502
• Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k peak plateaux (0<=k<=floor(n/2)). A peak plateau is a run of consecutive peaks that is preceded by an upstep and followed by a down step; a peak consists of an upstep followed by a downstep.at n=45A143952
• Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k peaks (n >= 2, k >= 1).at n=33A271940
• Complexity of computing the Fourier transform on the symmetric group S_n.at n=7A323945