杭电2077

#include<stdio.h>

long long hlt(long long n)
{
    if(!n)
        return 0;
    else
        return 2+3*hlt(n-1);
}


int main()
{
    int n,t;
    while(~scanf("%d",&n))
        while(n--)
        {
            scanf("%d",&t);
            printf("%lld\n",hlt(t-1)+2);
        }
}