Question 8
Find the sum of all positive integers $n$ for which
$$
\frac{15 \cdot n!^{2}+1}{2 n-3}
$$
is an integer.
$$
\frac{15 \cdot n!^{2}+1}{2 n-3}
$$
is an integer.
MathNet 2020 — Math Olympiad Vault — Part 03 Question 8
Math Olympiad Vault · MathNet 2020 — Math Olympiad Vault — Part 03