n = int(input())
a = [int(input()) for _ in range(n)]

def gcd(x,y):
    while True:
        r = x % y
        x = y
        y = r
        if r == 0:
            return x

count = 0
for i in range(n):
    for j in range(i+1,n):
        for k in range(j + 1,n):
            if gcd(gcd(i,j),k) == 1:count += 1
print(count)