n=input()
x,y=n/2,0
a=[n*['']for _ in[0]*n]
for c in range(1,n*n+1):
	a[y][x]="%3d"%c
	u,v=(x+1)%n,(y+2)%n
	if a[v][u]:u,v=x,(y+1)%n
	x,y=u,v	
for r in a:print' '.join(r)