924subject2.c

#include <stdio.h>
int recursion(int n){
  if(n == 1) return 1;
  if(n == 2) return 2;
  return 3*recursion(n-1)+2*recursion(n-2);
}
int main(){
  int n,i;
  printf("n = ");  
  while(scanf("%d", &n) != 1 || n < 3) {
    printf("#n must be at least 3.\n");
    while(getchar() != '\n') {}; 
    printf("n = ");
  }
  for(i=1;i<=n;i++){
    printf("%d ",recursion(i));
  }
  return 0;
}