#include <stdio.h>               /* squares4.c */

int step(int n) {
  static int d = 1;
  static int q = 1;
  int r = n * q;
  d += 2;
  q += d;
  return r;
}

int main() {
  int i;
  for(i = 1; i <4 ; i++)
     printf("%d  %d\n", i, step(i));
  return 0;
}