#Спиралько

L=int(input('Введите размер матрицы : '))

n = L
m = L
R = [0] * n
k=1
vverh=0
vpravo=0
diag=L-2
diag1=1
vverh1=0
vpravo1=0
counter=0
a=0
for i in range(n):
    R[i] = [0] * m
M=L


for i in range(L):
    if M>0:
        for j in range(vpravo1,M):      #Vpravo
            R[vpravo][j]=k
            k+=1
        vpravo+=1
        vpravo1+=1

    if M>0:
        a=diag
        for i in range(diag1,M):    #Diag
            R[i][diag]=k
            k+=1
            diag-=1
        diag=a-2
        diag1+=1
        M-=1

    if M>0:
        for i in range(M-1,vverh1,-1):#Vverh
            R[i][vverh]=k
            k+=1
        M-=1
        vverh+=1
        vverh1+=1

print('*'*50)
for row in R:
    for i in row:
        print('{:3d}'.format(i),end=' ')
    print()
print('*'*50)