#yuki_401

n=int(raw_input())
s=[[0 for i in xrange(n)] for j in xrange(n)]
i=1
m=n-1
x=0
y=0
while m>0:
 j=0
 while j<m:
  s[x][y]=i
  i+=1
  y+=1
  j+=1
 j=0
 while j<m:
  s[x][y]=i
  i+=1
  x+=1
  j+=1
 j=0
 while j<m:
  s[x][y]=i
  i+=1
  y-=1
  j+=1
 j=0
 while j<m:
  s[x][y]=i
  i+=1
  x-=1
  j+=1
 x+=1
 y+=1
 m-=2
if n%2!=0:
 s[n/2][n/2]=n*n

for i in xrange(n):
 for j in xrange(n):
  c=s[i][j]
  print "%03d" % c,
 print