How to find all possible xy=k passing through integer points in n*n square
93593
Unique Products on a Times Table
57992
choosing points interior to a square
117020
Regular $n$-gon in the plane with vertices on integers?
29713
$k$ times's draw from $n$ numbers with replacement, each number at least appear once
152638
The set of integers $n$ expressible as $n=x^2+xy+y^2$
140433
The number of ways of writing an integer as a sum of two squares
36287
How to create all possible permutations?
123117
Is it possible to find $n-1$ consecutive composite integers
70761
Number of ways to connect sets of $k$ dots in a perfect $n$-gon
76029
Induction proof: n lines in a plane
3786
Help finding a combinatorial proof of $k {n \choose k } = n {n - 1 \choose k -1}\;$
79854
How to iterate through array combinations with constant sum efficiently?
77547
Find integers $a,b,c,d$ such that
65843
Number of possible combinations of x numbers that sum to y
10044
Points at integer distance
54794
British Olympiad; Combinatorics Recursion
107110
Solving Rubik's cube and other permutation puzzles