Non-negative integers to form a sum with restrictions?
24036
extended stars-and-bars problem(where the upper limit of the variable is bounded)
93572
How to determine if $n (n \geq 2)$ given numbers can be summed up to a certain number?
157280
How do I sum up specific things in Numbers?
129163
Showing that every positive integer can be represented in this form
2932
How do I prove this sum is not an integer
76370
Can any integer can be written as the sum of 8 integer cubes?
37514
How many integers less than $1000$ can be expressed in the form $\frac{(x + y + z)^2}{xyz}$?
131625
Expressing an integer as the sum of three squares
21531
The number of nonnegative integer triples with sum equal to $12$
11971
How can I define a math operator behaving like \lim or \sum with limits?
104603
Integer program in which at least one of three inequalities holds
19776
Simplify a combinatorial sum
146439
Is every sufficiently large positive integer of the form $ab + ac + bc + 1$?
83145
Sum of rational numbers
2137
Find the number of ways to express 1050 as sum of consecutive integers
143271
Finite sum of reciprocal odd integers
74315
Constraint on variables in summation