题解 | #蛇形矩阵#

while True:
    try:
        N = int(input())
    except:
        break
    else:
        a = 0
        list = [0,]
        for x in range(1,N+1):
            a += x
            list.append(a)
#         [0, 1, 3, 6, 10, 15]
        for i in range(N,0,-1):
            line = N - i
            for j in range(1,i+1):
                b = list[line] + list[j] + line*(j-1)
                print(b,end=' ')
            print()
            
"""
1  3  6  10 15 21
2  5  9  14 20      1  2  3  4  5  
4  8  13 19         3  5  7  9     
7  12 18            6  9  12
11 17               10 14
16                  15
"""