Hi.
Please help me this question.
I have a list from this code
Solve[{x^2 + m x + n == k^2, 1 <= m <= 30, -10 <= n <= 50,
1 <= k <= 10, m^2 - 4 n != 0, x != 0}, {m, n, k, x}, Integers]
Now, I want only to select solution with m and n repeat 6 times. For example m = 9, n = -6.
How can I select?