n = int(input())

a=[]
for i in range(n):
    a.append([])
    for j in range(n):
        a[i].append(0)

i=j=0
c=1
d=1
while(c<=n**2):
    if a[i][j]==0:
        a[i][j] = c

    if d==1:
        i+=1
        if i==n or a[i][j]!=0:
            i-=1
            j+=1
            d=2
    elif d==2:
        j+=1
        if j==n or a[i][j]!=0:
            j-=1
            i-=1
            d=3
    elif d==3:
        i-=1
        if i<0 or a[i][j]!=0:
            i+=1
            j-=1
            d=4
    elif d==4:
        j-=1
        if j<0 or a[i][j]!=0:
            j+=1
            i+=1
            d=1
    c+=1

for i in range(n):
    s=""
    for j in range(n):
        s += "{}".format(a[j][i]).zfill(3) + " "
    print(s.strip())