import math
from functools import reduce

def gcd(*numbers):
    return reduce(math.gcd, numbers)

n=int(input())
a=[int(input()) for i in range(n)]
c=0
for i in range(n):
    for j in range(i+1,n):
        for k in range(j+1,n):
            if gcd(*[a[i],a[j],a[k]])==1:
                c+=1
print(c)