Find all positive integers, n<200, such that n² + (n+1)² is a perfect square.
120531
How to find all solutions for Pell's equation $x^2 - Dy^2 = -1$ after the first $x_0$ and $y_0$?
149071
Let $d$ be any positive integer not equal to $2, 5,$ or $ 13$ , then $\exists a, b \in \{2, 5, 13, d\}$ such that $ab − 1$ is not a perfect square?
72666
Prime Numbers And Perfect Squares
67968
When is $2^n -7$ a perfect square?
72761
Perfect square all 9's
129163
Showing that every positive integer can be represented in this form
102154
If $a$ and $b$ are consecutive integers, prove that $a^2 + b^2 + a^2b^2$ is a perfect square.
90076
Prove that every positive integer $n$ is a unique product of a square and a squarefree number
77564
How to prove for each positive integer $n$, the sum of the first $n$ odd positive integers is $n^2$?
44790
Find $n$ for which $\frac{n(n+1)}{2}$ is perfect square
106030
Find all the positive integer
29099
Let consider a square $10$x$10$ and write in the every unit square the numbers from $1$ to $100$
9146
Proving that a list of perfect square numbers is complete
114542
Can a number with $100$ $0$'s $100$ $1$'s and $100$ $2$'s ever be a perfect square?
38498
Find all primes $p$ such that $(2^{p-1}-1)/p$ is a perfect square
158124
Sum of all the positive integers problem
125702
There is a square $Q$ consisting of $(0,0), (2,0), (0,2), (2,2)$