Question 97
Find all pairs of positive integers $(k, n)$ for which
$$
1!+2!+\cdots+k!=1+2+\cdots+n
$$
$$
1!+2!+\cdots+k!=1+2+\cdots+n
$$
MathNet 2023-part-02 — 191 problems (EN–VI) Question 97
Math Olympiad Vault · MathNet 2023-part-02 — 191 problems (EN–VI)