When can an even number be written as the difference between two squares?
136933
Which $n$ can be expressed as $x^2 − y^2$?
127848
Determine which Fibonacci numbers are even
123267
Proving that even numbers equal the sum of two odd numbers.
107371
Why round to even integers?
39405
Symmetric difference = Ø
40030
FA that accepts odd number of $b$ and even number of $a$
135458
When is a sum of consecutive squares equal to a square?
79677
Difference of squares - number of representations
63895
What is the next perfect square of the form 14444... in decimal notation?
46606
Can an integer of the form $4n+3$ written as a sum of two squares?
17277
Why is Euler's Totient function always even?
20443
Calculate sum of squares of first $n$ odd numbers
67899
Integer squares of the form $x^4+x^3+x^2+x+1$
38167
What do I do when two squares are equally valid?
18633
Prove every odd integer is the difference of two squares
48787
A number is a perfect square if and only if it has odd number of positive divisors
146241
If $a \in \Bbb Z$ is the sum of two squares then $a$ can't be written in which of the following forms?