General formula for distinct k colourings of a regular n-gon
87821
Different Coloring of regular n-gon
74961
Prove that every edge-coloring of $K_{17}$ with $3$ colors contains a monochromatic $K_3$.
154038
A constructive lower bound on Ramsey numbers
67927
Combinatorial argument for the identity $k\binom{n}{k} = n\binom{n-1}{k-1}$
71564
Combinatorial proof of identity involving central binomial coefficients
72052
Combinatorics the number of options for $k$ different balls in n different cells, with at least $1$ ball in each cell
79972
Determining whether two $k$-chromatic graphs are isomorphic (respecting vertex coloration)
57986
Sum of products of combinatorials
116251
Number of distinct total orders on a set
69620
Need to find the recurrence equation for coloring a 1 by n chessboard
142477
Closed-form expression for the number of $k$-permutations of length $n$. Duplicates allowed!
40763
Possible orders of permutations of $11$ symbols
41294
Permutation module of $S_n$
123967
Proof of a generating functions formula
149104
Coloring $\mathbb R^n$ with $n$ colors always gives us a color with all distances.
8173
Number of ways to choose $n$ balls from $3n$ balls, distinguishable/indistinguishable.
117434
Counting integer partitions of n into exactly k distinct parts size at most M