N,c=int(input()),1
A=[[-1 for _ in range(N)] for _ in range(N)] 
d=i=j=0
while c<N*N+1 and d<N*N:
 if i<0 or N-1<i or j<0 or N-1<j or A[i][j]!=-1:i,j=s,t;d+=1
 else:A[i][j]=c;c+=1
 s,t=i,j
 i+=(0,1,0,-1)[d%4]
 j+=(1,0,-1,0)[d%4]
for a in A:
 for x in a:print('%03d'%x,end=' ')
 print()