include <iostream>

include <vector>

using namespace std;

int main() {
int n;
cin >> n;

vector<int> a(n + 1);
vector<int> pos(n + 1);

for (int i = 1; i <= n; ++i) {
cin >> a[i];
pos[a[i]] = i;
}

long long count = 0;
for (int i = 1; i <= n; ++i) {
for (int j = i + 1; j <= n; ++j) {
if ((long long)a[i] * a[j] == (long long)i + j) {
count++;
}
}
}

cout << count << endl;

return 0;
}