#include <fstream>
using namespace std;
ifstream cin("indep.in");
ofstream cout("indep.out");
const int nmax=500;
int n;
int v[nmax+5];
int cmmdc(int a,int b)
{
    if(b==0)
        return a;
    return cmmdc(b,a%b);
}
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
        cin>>v[i];
    long long s=0,fact=1;
    for(int i=1;i<=n-2;i++)
        fact=fact*2;
    fact--;
    for(int i=1;i<=n;i++)
        for(int j=i+1;j<=n;j++)
            if(cmmdc(v[i],v[j])==1)
                s+=fact;
    cout<<s;
    return 0;
}
/**
**/