#include<bits/stdc++.h>
using namespace std;

int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n;
        cin>>n;
        if(n<=2)
        {
            if(n==0) cout<<1<<endl;
            else if(n==1) cout<<2<<endl;
            else cout<<4<<endl;
            continue;
        }
        int dp[n+1];
        dp[0]=1,dp[1]=2,dp[2]=4;
        for(int i=3;i<=n;i++) dp[i]=dp[i-1]+dp[i-2]+dp[i-3];
        cout<<dp[n]<<endl;
    }
}