n=int(input())
l=[]
for i in range(1,n+1):
    if i%2==1:
        l.append([(i+j-1)%n for j in range(1,n+1)])
    else:
        l.append([(i+j+1)%n for j in range(1,n+1)])
l2=[]
for i in range(n):
    for j in range(n):
        if l[i][j]==0:
            l[i][j]+=n
for x in l:
    print(*x)