New posts in Enumerative Combinatorics

The number of ways to merge a permutation with itself

Counting nilpotent self-maps of $\{1,\dots,n\}$ with image of a given cardinal

Number of nonequivalent weight functions on a set of $n$ elements

Enumeration of lattice paths of a specific type

Number of collinear ways to fill a grid

Enumerating all arrangements of intervals with given lengths

Number of matchings of even cycles

A "quantum" identity: in search of a proof -Part II

An interesting identity: in search of a proof -Part I

Hooks in a rectangle: Part II