Partition of $\{1,2,3,…n\}$ into $3$ subsets
96457
$p$-Splittable Integers
146098
Number of nonempty subsets of a set with $n$ elements
101179
Partition of a set and Hall's theorem
141531
Find the set of $n\in\Bbb Z^+$ with $M=\{n,n+1,n+2,n+3,n+4,n+5\}$ partitionable into two sets
43979
The total number of subsets is $2^n$ for $n$ elements
47550
Number of distinct arrangements {$n_i$} $n_1<n_2<n_3<n_4<n_5$ such that $\sum n_i=20$
76405
Let n be an even integer. How many different ways can I choose subsets of the set {1,2...,n}
44013
How many trees over ${1,2,3,...n}$ with conditions
63321
Polynomials and partitions
5118
Show that $n ≤ 100$ if $ \{A_1,A_2,... ,A_n\}$ is a set of distinct $3$-element subsets of $\{1, 2,... , 36\}$ such that...
106397
Counting ways to partition a set into fixed number of subsets
134921
Find the number of all subsets of $\{1, 2, \ldots,2015\}$ with $n$ elements such that the sum of the elements in the subset is divisible by 5
8173
Number of ways to choose $n$ balls from $3n$ balls, distinguishable/indistinguishable.
46971
Number of surjections from $\{1,...,m\}$ to $\{1,...,n\}$
21754
Partition a set into subsets of size $k$
103538
Partitions of $n$ into distinct odd and even parts proof
120095
How many ways to split n elements in k groups?