Algorithm to find the numbers expressible as the sum of two positive cubes in two different ways
107674
Find taxicab numbers in $O(n)$ time
149481
Number theory counting sums of squares modulus
65648
Different ways to come up with $1+2+3+\cdots +n=\frac{n(n+1)}{2}$
135914
Evaluate the sum of cubes
116461
Prove the identity $\sum_{k=0}^{n}(-1)^{k}\binom{n}{k}=0$ using a combinatorial interpretation of the positive and negative terms
112644
The product of two numbers that can be written as the sum of two squares
149010
Finding Combinations to the provided Sum value
61134
Solving cubic equations with another method.
142978
combinatorics: sum of product of integer compositions
92106
Prove that $n$ is a sum of two squares?
4500
Brute force method of solving the cube: How many moves would it take?
145690
Quadratic algorithm for 4-SUM
148069
Different Sum signs
101835
Which rationals can be written as the sum of two rational squares?
33104
Combinatorial Proof with Summation Identity
93094
How do I solve this problem on maximizing sum modulo a given number?
50615
Expressing a Non Negative Integer as Sums of Two Squares