#include <stdio.h>

int n, v[512], sol[128], temp[128];

int cmmdc(int, int);
void mul(int*, int);
void add(int*, int*, int*);

int main()
{
	freopen("indep.in","r",stdin);
	freopen("indep.out","w",stdout);

	int i, j, p, k;
	scanf("%d", &n);

	for(i = 1; i <= n; ++i)
		scanf("%d", &v[i]);

	for(i = 1; i <= n; ++i)
	{
		p = k = 0;
		for(j = i + 1; j <= n; ++j)
		{
			if(cmmdc(v[i], v[j]) > 1)
				++p;
			else
				++k;
		}
		temp[0] = 1;
		temp[1] = 1;
		for(j = 1; j <= k; ++j)
			mul(temp, 2);
		--temp[1];
		for(j = 1; j <= p; ++j)
			mul(temp, 2);
		add(sol, sol, temp);
		for(j = temp[0]; j >= 0; --j)
			temp[j] = 0;
	}
	for(i = sol[0]; i > 0; --i)
		printf("%d", sol[i]);
	printf("\n");
	return 0;
}

int cmmdc(int a, int b)
{
	if(a % b == 0)
		return b;
	return cmmdc(b, a % b);
}

void mul(int* a, int b)
{
	int i, t;

	for(t = 0, i = 1; i <= a[0] || t; ++i, t /= 10)
	{
		a[i] = (t += a[i] * b) % 10;
	}
	a[0] = i - 1;
}

void add(int* dest, int*a, int* b)
{
	int i, t;
	
	for(i = 1, t = 0; i <= a[0] || i <= b[0] || t; ++i, t /= 10)
		dest[i] = (t += a[i] + b[i]) % 10;

	dest[0] = i - 1;
}