import Foundation

let n = Int(readLine()!)!
var (y,x,cnt,dir) = (1,1,1,0)
let RDLU = [[0,1],[1,0],[0,-1],[-1,0]]

var map = [[Int]]() //空のmapを用意
for _ in 0...n + 1{
    map += [(Array<Int>)(repeating: -1, count: n + 2)]
}

for Y in 1...n{ //壁法で使うので真ん中を0にする
    for X in 1...n{
        map[Y][X] = 0
    }
}

while cnt <= n * n{
    map[y][x] = cnt
    cnt += 1
    if map[y + RDLU[dir][0]][x + RDLU[dir][1]] != 0{
        dir += dir < 3 ? 1 : -3
    }
    (y,x) = (y + RDLU[dir][0],x + RDLU[dir][1])
}


for Y in 1...n{
    for X in 1...n{
        print(String(format: "%03d", map[Y][X]),terminator: " ")
    }
    print()
}