222892

Appears in sequences

• Triangle read by rows: T(n,k) is number of Dyck n-paths with k UUDDs, 0 <= k <= n/2.at n=50A098978
• Number of length n left factors of Dyck paths having no UUDD's; here U=(1,1) and D=(1,-1).at n=23A191794
• The number of peaks of width 1 (i.e., UHD configurations, where U = (0,1), H=(1,0), D=(0,-1)) in all bargraphs of semiperimeter n (n>=2).at n=12A273716