n = int(input())

ans = [[0]*(n+2) for _ in range(n+2)]
for i in range(n+2): # 番兵を配置
    ans[0][i] = 1 
    ans[-1][i] = 1 
    ans[i][0] = 1 
    ans[i][-1] = 1  

now_u = 1
now_v = 1 
ans[1][1] = 1 

for i in range(2,n**2+1):
    if ans[now_v][now_u] == 0:
        now_u,now_v = now_v,now_u 
    elif now_u >= now_v:
        if ans[now_u+1][now_v] == 0:
            now_u += 1      
        elif ans[now_u][now_v+1] == 0:
            now_v += 1 
        else:
            now_u = n+2-now_u
            now_v = n+2-now_v            
    else:
        if ans[now_u][now_v+1] == 0:
            now_v += 1      
        else:
            now_u += 1 

    ans[now_u][now_v] = i


for i in ans[1:-1]:
    print(*i[1:-1])