import sequtils, strutils
proc printf(str: cstring) {.header: "<stdio.h>", importc: "printf", varargs.}
let n: int = stdin.readline.parseInt
var
  a: seq[seq[int]] = newSeqWith(n, newSeq[int](n))
  b: seq[seq[bool]] = newSeqWith(n, newSeq[bool](n))
  x, y, tx, ty, cnt: int
  dx: array[4, int] = [1, 0, -1, 0]
  dy: array[4, int] = [0, 1, 0, -1]
a[x][y] = 1
b[x][y] = true
for i in 1..<(n * n):
  tx = x + dx[cnt and 3]
  ty = y + dy[cnt and 3]
  if tx < 0 or tx >= n or ty < 0 or ty >= n or b[tx][ty]:
    cnt.inc
    tx = x + dx[cnt and 3]
    ty = y + dy[cnt and 3]
  x = tx
  y = ty
  a[x][y] = i + 1
  b[x][y] = true
for j in 0..<n:
  for i in 0..<n:
    printf("%03d", a[i][j])
    if i == n - 1:
      printf("\n")
    else:
      printf(" ")