116868

Appears in sequences

• Number of ordered rooted trees with n edges having root of odd degree.at n=11A000958
• Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having exactly k UDU's at low level.at n=66A098747
• Triangle read by rows: T(n,k) is the number of ordered trees with n edges having k even-length branches starting at the root (0<=k<=n).at n=42A127541
• Number of idempotent 4 X 4 0..n matrices of rank 1.at n=21A224526