N cannot be partitioned into a finite number of arithmetic progressions
135955
Prove: The positive integers cannot be partitioned into arithmetic sequences (using Complex Analysis)
153892
Number Theory divisibilty
112182
Sequence of positive integers such that their reciprocals are in arithmetic progression
47060
Split $n$ into nontrivial factors via a nontrivial square-root of $1\!\pmod{\!n}$
72591
Find a bijection to prove a fact about integer partitions
123117
Is it possible to find $n-1$ consecutive composite integers
147484
For a set with N members, what is the number of set partitions in which each subset is either of size 1 or 2?
96086
Double Factorial: Number of possibilities to partition a set of $2n$ items into $n$ pairs
74829
Number of non decreasing sequences of length $M$
153370
Number of different partitions of N
3217
Construction of uncountably many non-isomorphic linear (total) orderings of natural numbers
106397
Counting ways to partition a set into fixed number of subsets
96457
$p$-Splittable Integers
79984
Partition of ${1, 2, ... , n}$ into subsets with equal sums.
15187
Integer reciprocals in arithmetic progression
14409
A problem about function N
117862
Number of partitions of an $n$-element set into $k$ classes