#roll
N=int(input())
M=[]
for i in range(N):
    M.append([])
    for j in range(N):
        M[i].append(0)
k=1
N2=N//2
for i in range(N2):
    i2=2*i
    for j in range(N-1-i2):
        M[i][i+j]=k
        k+=1
    for j in range(N-1-i2):
        M[i+j][N-1-i]=k
        k+=1
    for j in range(N-1-i2):
        M[N-1-i][N-1-i-j]=k
        k+=1
    for j in range(N-1-i2):
        M[N-1-i-j][i]=k
        k+=1
if N%2==1:
    M[N2][N2]=k
for i in range(N):
    for j in range(N):
        if M[i][j]<10:
            M[i][j]="00"+str(M[i][j])
        elif M[i][j]<100:
            M[i][j]="0"+str(M[i][j])
        else:
            M[i][j]=str(M[i][j])
    print(" ".join(M[i]))