View Compilation Error

0_0_14253041_17058.cpp:4:82: error: expected constructor, destructor, or type conversion before '(' token
 int t,n,i,a[31]; a[1]=1; a[2]=3; for(i=3;i<=31;i++) a[i]=2*a[i-2]+a[i-1]; } scanf("%d",&t); while(t--) { scanf("%d",&n); printf("%d\n",a[n]); }
                                                                                  ^
0_0_14253041_17058.cpp:4:93: error: expected unqualified-id before 'while'
 int t,n,i,a[31]; a[1]=1; a[2]=3; for(i=3;i<=31;i++) a[i]=2*a[i-2]+a[i-1]; } scanf("%d",&t); while(t--) { scanf("%d",&n); printf("%d\n",a[n]); }
                                                                                             ^