dx=[1,0,-1,0,1,-1,-1,1]
dy=[0,1,0,-1,1,1,-1,-1]


N=int(input())
F=[[0]*N for i in range(N)]

def is_ok(x,y,x0):
    return  x0<=x<N-x0 and x0<=y<N-x0

x=y=0
x0=0
dir=6
for i in range(1,N**2+1):
    F[x][y]=i
    if dir==0:
        if y==x0:
            dir=5
        else:
            dir=7
    elif dir==1:
        if x==x0:
            dir=7
        else:
            dir=5
    elif dir==5:
        if y==N-1-x0:
            dir=0
        else:
            dir=1
    elif dir==7:
        if x==N-1-x0:
            dir=1
        else:
            dir=0
    elif dir==6:
        dir=0
            
    if x==N-1-x0 and y==N-1-x0:
        x0+=1
        x=x0
        y=x0
        dir=6
        continue;
    if dir<4:
        x+=dx[dir]
        y+=dy[dir]
    else:
        ok=0
        ng=N+1
        while ng-ok>1:
            mid=(ng+ok)//2
            if is_ok(x+mid*dx[dir],y+mid*dy[dir],x0):
                ok=mid
            else:
                ng=mid
        x+=ok*dx[dir]
        y+=ok*dy[dir]
    
    
    
for i in F:
    print(*i)