N=int(input())
LIST=[[str(N*N).zfill(3)]*N for i in range(N)]

def write(x,y,z,w,c,now):
    for i in range(c):
        LIST[x][y+i]=now
        now+=1

    for i in range(c):
        LIST[x+i][w]=now
        now+=1

    for i in range(c):
        LIST[z][w-i]=now
        now+=1

    for i in range(c):
        LIST[z-i][y]=now
        now+=1

    return now

now=1
for k in range(N//2):
    now=write(0+k,0+k,N-1-k,N-1-k,N-1-k*2,now)

for i in range(N):
    for j in range(N):
        LIST[i][j]=str(LIST[i][j]).zfill(3)

for i in range(N):
    print(*LIST[i])