n=int(input()) a=[ [0]*n for x in range(n)] num=1 x,y=0,n-1 while num<=n**2: while 0<=x<=n-1 and 0<=y<=n-1 and a[x][y]==0: a[x][y]=num x+=1 num+=1 x=x-1 y=y-1 while 0<=x<=n-1 and 0<=y<=n-1 and a[x][y]==0: a[x][y]=num y-=1 num+=1 x=x-1 y=y+1 while 0<=x<=n-1 and 0<=y<=n-1 and a[x][y]==0: a[x][y]=num x-=1 num+=1 x=x+1 y=y+1 while 0<=x<=n-1 and 0<=y<=n-1 and a[x][y]==0: a[x][y]=num y+=1 num+=1 x=x+1 y=y-1 for row in a: print(*row)