#include<iostream>
#include<vector>
#include<array>
#include<random>
#include<map>
using namespace std;
const int T=3;
using dat=array<unsigned int,T>;
bool isp[1<<20];
vector<int>ps;
unsigned int hs[T][1<<20];
int N,A[2<<17];
main()
{
	for(int i=2;i<1<<20;i++)if(!isp[i])
	{
		ps.push_back(i);
		for(int j=i+i;j<1<<20;j+=i)isp[j]=true;
	}
	mt19937 rng(114514);
	for(int p:ps)
	{
		for(int i=0;i<T;i++)hs[i][p]=rng();
	}
	cin>>N;
	map<dat,int>cnt;
	long ans=0;
	dat now={};
	cnt[now]=1;
	for(int i=0;i<N;i++)
	{
		cin>>A[i];
		for(int j=0;ps[j]*ps[j]<=A[i];j++)if(A[i]%ps[j]==0)
		{
			int c=0;
			while(A[i]%ps[j]==0)A[i]/=ps[j],c++;
			if(c%2)
			{
				for(int k=0;k<T;k++)now[k]^=hs[k][ps[j]];
			}
		}
		if(A[i]>1)
		{
			for(int k=0;k<T;k++)now[k]^=hs[k][A[i]];
		}
		ans+=cnt[now]++;
	}
	cout<<ans<<endl;
}