n = int(input())

ls = []
for i in range(n):
    for j in range(n):
        ls.append([i,j])
ls.remove([0,0])

a = [[0,1], [1,0], [0,-1], [-1,0]]
ps = [0,0]
ts = [0,0]
sq = [[0,0]]
ap = 0
while len(ls) > 0:
    ts[0] = ps[0]+a[ap%4][0]
    ts[1] = ps[1]+a[ap%4][1]
    if ts in ls:
        ps = ts.copy()
        sq.append(ps)
        ls.remove(ps)
    else:
        ap += 1
        ts[0] = ps[0]+a[ap%4][0]
        ts[1] = ps[1]+a[ap%4][1]
        ps = ts.copy()
        sq.append(ps)
        ls.remove(ps)

tmp=[]
for i in range(n):
    tmp.append([])
    for j in range(n):
        tmp[i].append([])

numb = [str(i+1).zfill(3) for i in range(n**2)]

for i,j in zip(sq,numb):
    tmp[i[0]][i[1]] = j

for i in range(n):
    print(" ".join(tmp[i]))