n=int(input())
field = [[None]*n for i in [0]*n]
y,x=0,0
m=0
d={0:(0,1),1:(1,0),2:(0,-1),3:(-1,0)}
for i in range(1,n**2+1):
    field[y][x]="{0:03d}".format(i)
    y+=d[m][0];x+=d[m][1]
    ny,nx=y+d[m][0],x+d[m][1]
    if not (0<=ny<n and 0<=nx<n and field[ny][nx] is None):
        m=(m+1)%4

for l in field:
    print(*l)