Formula or way for the number expressed as sum of two squares in two different ways?
1001
Number of integer solutions of $x^2 + y^2 = k$
39659
Is there a closed formula for this summation?
50615
Expressing a Non Negative Integer as Sums of Two Squares
112644
The product of two numbers that can be written as the sum of two squares
136582
Decomposing total sum of squares
72437
Sum of the digits of a perfect square
34617
Number Theory: which primes are a sum of two squares?
7073
How to get to the formula for the sum of squares of first n numbers?
97984
Express as sum of powers
67899
Integer squares of the form $x^4+x^3+x^2+x+1$
4194
Which integers can be expressed as a sum of squares of two coprime integers?
147562
Sum of squares diophantine equation
44577
Finding a formula to sum natural numbers up to $n$
142978
combinatorics: sum of product of integer compositions
149267
Complete the square on cross terms?
113299
Equation numbering in square brackets
98440
Show that any non-negative rational integer may be written as the sum of two squares if it is of the form....