What are the number of possible partitions of a set containing n elements?
35362
Number of equivalence relations on a set
117658
A set with n elements has 2^n subsets
96086
Double Factorial: Number of possibilities to partition a set of $2n$ items into $n$ pairs
86263
How do we show there are the same number of elements in each of the sets?
45386
Fibonacci sequence emerging from integer partitioning
120095
How many ways to split n elements in k groups?
102510
Count number of subsets of 3 elements either disjoint or whose intersection is a singleton
1409
Proving that the given set has at most $2^{n-1}$ elements
79984
Partition of ${1, 2, ... , n}$ into subsets with equal sums.
8149
Algorithm to return all combinations of k elements from n
114968
Partition of a set, definition not clear
92941
# of partitions of $n$ into at most $r$ positive integers $=$ # of partitions of $n + r$ into exactly $r$ positive integers?
57954
How many transitive relations on a set of $n$ elements?
97314
Counting nearly-sorted permutations
20973
How can I find all the subsets of a set, with exactly n elements?
47592
Integer partitions in all orderings
153651
Countable partition in atoms