Circular arrangement of equal quantities of letters or objects
4747
arrangement of $n$ oranges and $n$ apples around a circle
48728
Number equations and preserving alignment of equal signs
96086
Double Factorial: Number of possibilities to partition a set of $2n$ items into $n$ pairs
128480
Selection in Circular Table
58015
Two math sections of the same type in a row?
34293
Homeomorphism between pairs of letters
63571
The Mississipi counting problem, this time in circle
41462
Distribute objects optimaly
147861
Packing squares into a circle
58749
Choose K items from N in a circle
59419
Crafty solutions to the following limit
34616
Number of ways of distributing balls into boxes
115209
Elementary formula for permutations?
62577
The number of ways to order 26 alphabet letters, no two vowels occurring consecutively
97254
What is the proof of permutations of similar objects?
117898
Separate the alphabet and digit such that their relative order remains the same in O(n) time and O(1) space
19101
Permutation induced by a partition