def rotate(tup:tuple[int,int])->tuple:
  return (tup[1],-tup[0])


def main():
  N=int(input())
  field=[[0 for i in range(N)] for j in range(N)]
  _count=1
  x=0
  y=0
  field[y][x]=_count
  _count+=1
  direction=(0,1)
  while _count<=N*N:
    if x+direction[0]<0 or x+direction[0]>=N or y+direction[1]<0 or y+direction[1]>=N or field[y+direction[1]][x+direction[0]]!=0:
      direction=rotate(direction)
    x+=direction[0]
    y+=direction[1]
    field[y][x]=_count
    _count+=1
  field=zip(*field)
  for row in field:
    print(*map(lambda x:f"{x:03}",row))
  
if __name__=="__main__":
  main()