Enumeration of perfect matchings of a type of Cartesian products of graphs

Enumeration of permutations by number of cyclic peaks and cyclic valleys

Enumeration of permutations containing a prescribed number of occurrences of a pattern of length 3

Enumeration of pyramids of one-dimensional pieces of arbitrary fixed integer length

Enumeration of Restricted Partition Pairs and Permutation Pairs via 0-1 Tableaux

Enumeration of rhombus tilings of a hexagon which contain a fixed rhombus in the centre

Enumeration of rhombus tilings of a hexagon which contain a fixed rhombus on its symmetry axis

Enumeration of saturated chains in Dyck lattices

Enumeration of snakes and cycle-alternating permutations

Enumeration of some classes of words avoiding two generalized patterns of length three

Enumeration of spanning subgraphs with degree constraints

Enumeration of Splitting Subspaces over Finite Fields

Enumeration of subtrees of trees

Enumeration of Symmetry Classes of Alternating Sign Matrices and Characters of Classical Groups

Enumeration of symmetry classes of convex polyominoes in the square lattice

Enumeration of symmetry classes of convex polyominoes on the honeycomb lattice

Enumeration of Symmetry Classes of Parallelogram Polyominoes

Enumeration of tilings of diamonds and hexagons with defects

Enumeration of totally positive Grassmann cells

Enumeration of Unlabeled Outerplanar Graphs