#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
int main()
{
int test,cycles;
int growth,i;
scanf("%d",&test);
while(test>0)
{
scanf("%d",&cycles);
growth=0;
for(i=0;i<=cycles;i++)
{
if(i%2==0)
growth=growth+1;
else
growth=growth+growth;
}
test--;
printf("%d\n",growth);
}
return 0;
}