一、什么是幻方
在一个由若干个排列整齐的数组成的正方形中,图中任意一横行、一纵行及对角线的几个数之和都相等,具有这种性质的图表,称为“幻方”。我国古代称为“河图”、“洛书”,又叫“纵横图”。
17 | 24 | 1 | 8 | 15 |
23 | 5 | 7 | 14 | 16 |
4 | 6 | 13 | 20 | 22 |
10 | 12 | 19 | 21 | 3 |
11 | 18 | 25 | 2 | 9 |
如填定数字超出幻方格范围,则把幻方看成是可以无限伸展的图形,如下图:
1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
3 | 4 | 5 | 3 | 4 | 5 | 3 | 4 | 5 |
7 | 8 | 9 | 7 | 8 | 9 | 7 | 8 | 9 |
1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
3 | 4 | 5 | 4 | 5 | 6 | 3 | 4 | 5 |
7 | 8 | 9 | 7 | 8 | 9 | 7 | 8 | 9 |
1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 |
3 | 4 | 5 | 3 | 4 | 5 | 3 | 4 | 5 |
7 | 8 | 9 | 7 | 8 | 9 | 7 | 8 | 9 |
将n阶幻方看作一个矩阵,记为A,其中的第i行j列方格内的数字记为a(i,j)。当填写到i>n时,i=i-n,j同样如此。
2、loubere法
23 | 6 | 19 | 2 | 15 |
10 | 18 | 1 | 14 | 22 |
17 | 5 | 13 | 21 | 9 |
4 | 12 | 25 | 8 | 16 |
11 | 24 | 7 | 20 | 3 |
23 | 12 | 1 | 20 | 9 |
4 | 18 | 7 | 21 | 15 |
10 | 24 | 13 | 2 | 16 |
11 | 5 | 19 | 8 | 22 |
17 | 6 | 25 | 14 | 3 |
1 | 5 | 4 | 3 | 2 | 6 |
6 | 2 | 3 | 4 | 5 | 1 |
1 | 2 | 3 | 4 | 5 | 6 |
6 | 5 | 3 | 4 | 2 | 1 |
6 | 2 | 4 | 3 | 5 | 1 |
1 | 5 | 4 | 3 | 2 | 6 |
1 | 8 | 1 | 1 | 8 | 8 | 8 | 1 |
7 | 2 | 2 | 2 | 7 | 7 | 2 | 7 |
6 | 3 | 3 | 3 | 6 | 3 | 6 | 6 |
5 | 4 | 4 | 4 | 4 | 5 | 5 | 5 |
4 | 5 | 5 | 5 | 5 | 4 | 4 | 4 |
3 | 6 | 6 | 6 | 3 | 6 | 3 | 3 |
2 | 7 | 7 | 7 | 2 | 2 | 7 | 2 |
8 | 1 | 8 | 8 | 1 | 1 | 1 | 8 |
1 | 35 | 4 | 33 | 32 | 6 |
30 | 8 | 9 | 28 | 11 | 25 |
19 | 14 | 15 | 16 | 23 | 24 |
18 | 23 | 21 | 22 | 14 | 13 |
12 | 26 | 28 | 9 | 29 | 7 |
31 | 5 | 34 | 3 | 2 | 36 |
A | C |
D | B |
35 | 1 | 6 | 26 | 19 | 24 |
3 | 32 | 7 | 21 | 23 | 25 |
31 | 9 | 2 | 22 | 27 | 20 |
8 | 28 | 33 | 17 | 10 | 15 |
30 | 5 | 34 | 12 | 14 | 16 |
4 | 36 | 29 | 13 | 18 | 11 |
2×n-2 | 1 | | | 5 | | | n×n-2×n+4 |
| | | | | | | 2×n-4 |
| | | | | | | 2×n-5 |
2 | | | | | | | |
| | | | | | | 6 |
| | | | | | | |
| | | | | | | |
2×n-3 | | 3 | 4 | | | | n×n-2×n+3 |
2×n-2 | 1 | | | 4 | 5 | | | | n×n-2×n+4 |
| | | | | | | | | 2×n-4 |
| | | | | | | | | 2×n-5 |
| | | | | | | | | 2×n-6 |
| | | | | | | | | 2×n-7 |
2×n-8 | | | | | | | | | |
2×n-9 | | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
2×n-3 | | 2 | 3 | | | 6 | | | n×n-2×n+3 |
10 | 1 | 34 | 33 | 5 | 28 |
29 | 23 | 22 | 11 | 18 | 8 |
30 | 12 | 17 | 24 | 21 | 7 |
2 | 26 | 19 | 14 | 15 | 35 |
31 | 13 | 16 | 25 | 20 | 6 |
9 | 36 | 3 | 4 | 32 | 27 |
16 | 2 | 3 | 13 |
5 | 11 | 10 | 8 |
9 | 7 | 6 | 12 |
4 | 14 | 15 | 1 |
15 | 10 | 3 | 6 |
4 | 5 | 16 | 9 |
14 | 11 | 2 | 7 |
1 | 8 | 13 | 12 |
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