227892

Appears in sequences

• Erroneous version of A342587.at n=22A008285
• Number of labeled order relations on n nodes in which longest chain has 2 nodes.at n=5A055531
• Triangle T(n,k) of weakly graded (3+1)-free partially ordered sets (posets) on n labeled vertices with height k.at n=22A222866
• Triangle, read by rows: T(n,k) is the number of labeled order relations on n nodes in which the longest chain has k nodes (n>=1, 1<=k<=n).at n=22A342587
• Triangle read by rows: T(n,k) is the number of labeled weakly graded (ranked) posets with n elements and rank k.at n=30A361951