N = int(input())
lsHW = [[-1 for i in range(N)] for i in range(N)]
lsHW[0][0] = '001'
d = 0

num = 1
x,y = 0,0
for i in range(N*N-1):
    if d == 0:
        if y+1 < N and lsHW[x][y+1] == -1:
            lsHW[x][y+1] = (3-len(str(num+1)))*'0'+str(num+1)
            y += 1
        else:
            lsHW[x+1][y] = (3-len(str(num+1)))*'0'+str(num+1)
            x += 1
            d += 1
    elif d == 1:
        if x+1 < N and lsHW[x+1][y] == -1:
            lsHW[x+1][y] = (3-len(str(num+1)))*'0'+str(num+1)
            x += 1
        else:
            lsHW[x][y-1] = (3-len(str(num+1)))*'0'+str(num+1)
            y -= 1
            d += 1
    elif d == 2:
        if y-1 >= 0 and lsHW[x][y-1] == -1:
            lsHW[x][y-1] = (3-len(str(num+1)))*'0'+str(num+1)
            y -= 1
        else:
            lsHW[x-1][y] = (3-len(str(num+1)))*'0'+str(num+1)
            x -= 1
            d += 1
    else:
        if x-1 >= 0 and lsHW[x-1][y] == -1:
            lsHW[x-1][y] = (3-len(str(num+1)))*'0'+str(num+1)
            x -= 1
        else:
            lsHW[x][y+1] = (3-len(str(num+1)))*'0'+str(num+1)
            y += 1
            d = 0
    num += 1
for i in range(N):
    print(*lsHW[i],sep=' ')