Enumeration of linear chord diagrams

Enumeration of lozenge tilings of hexagons with a central triangular hole

Enumeration of lozenge tilings of hexagons with cut off corners

Enumeration of m-ary cacti

Enumeration of Matchings: Problems and Progress

Enumeration of non-crossing pairings on bit strings

Enumeration of non-positive planar trivalent graphs

Enumeration of paths and cycles and e-coefficients of incomparability graphs

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