What is the least possible positive integer-value of n such that sqrt(18*n*34) is an integer?

18*2 = 36 which is a perfect square so n could have a factor 2
if we use 34^2   we have 18*2 * 34^2 =  41616  whose square root is 204

so n = 2*34  = 68 is one possibility but Im not sure if that is the least possible integer value.

what we need is a perfect square which is also divisible by 34.

The correct answer is -4