N=int(input())

L=[]
l=[10**9 for i in range(N+2)]
L.append(l)
for i in range(N):
    a=[10**9]+[0 for i in range(N)]+[10**9]
    L.append(a)
L.append(l)

#print(L)
Position=[1,1]
H=[0,1,0,-1]
W=[1,0,-1,0]
Muki=0

for i in range(1,N**2+1):
    if i<100:
        L[Position[0]][Position[1]]=str(i+10000)[2:]
    else:
        L[Position[0]][Position[1]]=str(i)
    if L[Position[0]+H[Muki]][Position[1]+W[Muki]]==0:
        Position=[Position[0]+H[Muki],Position[1]+W[Muki]]
    else:
        Muki+=1
        Muki%=4
        Position=[Position[0]+H[Muki],Position[1]+W[Muki]]

for i in range(1,N+1):
    print(*L[i][1:N+1])