3497248

Appears in sequences

• Number of nodes of odd outdegree in all ordered rooted (planar) trees with n edges.at n=12A014300
• Number left factors of Dyck paths of length n and having no hills; a hill is a (1,1)-step starting at level 0 and followed by a (1,-1)-step.at n=25A191526
• Number of 6Xn 0..1 arrays with rows unimodal and columns nondecreasing.at n=12A225013