Hankel matrices and lattice paths.
A relation between restricted and unrestricted weighted Motzkin paths.
Animals and 2-Motzkin paths.
The Lagrange inversion formula and divisibility properties.
A recursive relation for weighted Motzkin sequences.
Generating functions via Hankel and Stieltjes matrices.
Dyck paths with no peaks at height .
Exponential generating functions for trees with weighted edges and labeled nodes.
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