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MathNet 2010 — Part 03 Question 68

Math Olympiad Vault · MathNet 2010 — Part 03

Question 68

Prove that there are infinitely many positive integers $m$ for which there exist consecutive odd positive integers $p_m, q_m$ ($\equiv p_m + 2$) such that the pairs $(p_m, q_m)$ are all distinct and
$$
p_m^2 + p_m q_m + q_m^2, \quad p_m^2 + m p_m q_m + q_m^2
$$
are both perfect squares.