Question 63
Find all positive integers $n$ such that
$$
a! + b! + c! = 2^n
$$
for some positive integers $a, b, c$.
$$
a! + b! + c! = 2^n
$$
for some positive integers $a, b, c$.
MathNet 2014 Question 63
Math Olympiad Vault · MathNet 2014
Math Olympiad Vault · MathNet 2014