New user? Sign up

Existing user? Log in

$4$ has the property that if one adds it to double its square, it yields a perfect square. In other words for natural numbers $m,n$:

$n^2 + n^2 + n = m^2$

There are four such $n<10^6$. If $4$ is the smallest $n$, what is the second smallest $n$?

Problem Loading...

Note Loading...

Set Loading...