递归入门 杭电 2042

#include<stdio.h>
int sheep(int a)
{
if(a == 0) return 3;
else
return (sheep(a-1)-1)*2;
}
int main()
{
int n;
scanf("%d",&n);
while(n--)
{
int num;
scanf("%d",&num);
printf("%d\n",sheep(num));
}
return 0;
}