N=int(input())
result=[[0]*N for i in range(N)]
c=0
x=0
y=0
t=0
count=0
while True:
  if c==N**2:
    break
  if t==0:
    if x==y or x==N-1-y:
      c+=1
      result[x][y]=c
      if c==N**2:
        break
      c+=1
      a,b=N-1-x,N-1-y
      result[a][b]=c
      c+=1
      a,b=x,N-1-y
      result[a][b]=c
      c+=1
      a,b=N-1-x,y
      result[a][b]=c
      t=1
      x,y=N-1-x,y
      if count%2==0:
        y+=1
      else:
        y-=1
    else:
      c+=1
      result[x][y]=c
      c+=1
      result[y][x]=c
      c+=1
      result[y][N-1-x]=c
      c+=1
      result[N-1-x][y]=c
      x,y=N-1-x,y
      t=1
      if count%2==0:
        if result[x][y+1]>0:
          count+=1
          x-=1
        else:
          y+=1
      else:
        if result[x][y-1]>0:
          count+=1
          x-=1
        else:
          y-=1
  else:
    if x==y or x==N-1-y:
      c+=1
      result[x][y]=c
      if c==N**2:
        break
      c+=1
      a,b=N-1-x,N-1-y
      result[a][b]=c
      c+=1
      a,b=x,N-1-y
      result[a][b]=c
      c+=1
      a,b=N-1-x,y
      result[a][b]=c
      t=0
      x,y=N-1-x,y
      if count%2==0:
        y+=1
      else:
        y-=1
    else:
      c+=1
      result[x][y]=c
      c+=1
      result[y][x]=c
      c+=1
      result[y][N-1-x]=c
      c+=1
      result[N-1-x][y]=c
      x,y=N-1-x,y
      t=0
      if count%2==0:
        if result[x][y+1]>0:
          count+=1
          x+=1
        else:
          y+=1
      else:
        if result[x][y-1]>0:
          count+=1
          x+=1
        else:
          y-=1
for i in range(N):
  print(*result[i])