Combinatorics: arranging $n$ balls in $k$ cell with condition
24036
extended stars-and-bars problem(where the upper limit of the variable is bounded)
43845
Partitioning the edges of $K_n$ into $\lfloor \frac n6 \rfloor$ planar subgraphs
34334
Combinatorics Problem with symbols and spaces
70761
Number of ways to connect sets of $k$ dots in a perfect $n$-gon
61572
Evenly distributing n points on a sphere
74730
Combinatorial Proof of ${{n}\choose{k}} {{k}\choose{j}} = {{n}\choose{j}} {{n-j}\choose{k-j}}$
41205
Help me solve a combinatorial problem
46469
$n$ Lines in the Plane
56135
Find all permutations with a condition
49912
Generating ordered combination of numbers
134938
Committee combinatorics
96086
Double Factorial: Number of possibilities to partition a set of $2n$ items into $n$ pairs
142180
There are 'n' candies and 't' boxes. Find the number of ways to place the candies in the boxes for each of the conditions (given in the problem).
117862
Number of partitions of an $n$-element set into $k$ classes
21000
Calculating $\sum_{k=1}^nk(k!)$ combinatorially
626
Sum of combinations with varying $n$
73323
Permutations when some objects are alike