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18阶广义完美平方幻方
最后,我们谈谈完美平方幻方的问题,我们知道完美幻方具有更美妙的特性,它的每条泛对角线都等于幻和。自然,我们希望得到一个完美平方幻方,但人们努力许多年,没有什么结果。1903 年, Gaston Tarry得到了一个8阶平方幻方兼完美幻方,觉得很高兴,1939年H. Schots, Belgium得到一个8阶完美幻方(图22),其所有的泛对角线平方和相等,也是一次对完美平方幻方的努力。2000年,中国幻方专家苏茂挺,经过艰苦努力,终于实现了幻方爱好者多年的梦想。两个18阶完美平方幻方(图24)构造成功了,虽然是非连续自然数,但人们对此优为欣慰,因为它的美妙令人赞赏。
苏茂挺
The 18th-order pan-Bimagic
square
by Su Maoting in China for 2000-09
| + |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
| 1 |
66 |
1921 |
98 |
1913 |
56 |
1834 |
1457 |
1226 |
1342 |
1330 |
1284 |
1431 |
1756 |
132 |
1839 |
36 |
1939 |
14 |
| 2 |
339 |
385 |
217 |
918 |
2109 |
888 |
2128 |
711 |
2118 |
2066 |
773 |
2110 |
812 |
2183 |
944 |
295 |
397 |
281 |
| 3 |
100 |
54 |
1473 |
78 |
1297 |
1899 |
1218 |
1850 |
1804 |
1786 |
1902 |
1292 |
1961 |
1375 |
2 |
1415 |
80 |
88 |
| 4 |
962 |
824 |
353 |
733 |
323 |
2129 |
262 |
2158 |
2175 |
2117 |
2080 |
250 |
2055 |
297 |
751 |
429 |
876 |
900 |
| 5 |
1345 |
1481 |
1281 |
133 |
1826 |
38 |
1838 |
34 |
1943 |
1917 |
46 |
1914 |
96 |
1764 |
55 |
1229 |
1407 |
1327 |
| 6 |
703 |
2063 |
813 |
2113 |
940 |
2133 |
417 |
294 |
341 |
279 |
218 |
365 |
2159 |
922 |
2125 |
887 |
2121 |
781 |
| 7 |
1808 |
1293 |
1882 |
1305 |
1959 |
1418 |
1 |
85 |
30 |
104 |
103 |
79 |
1470 |
1901 |
1367 |
1870 |
1217 |
1782 |
| 8 |
2081 |
2115 |
2105 |
230 |
748 |
301 |
879 |
428 |
892 |
970 |
354 |
821 |
319 |
736 |
282 |
2079 |
2177 |
2157 |
| 9 |
1893 |
1915 |
49 |
1766 |
93 |
1249 |
125 |
1323 |
1406 |
1482 |
1349 |
63 |
1261 |
41 |
1824 |
31 |
1837 |
1967 |
| 10 |
219 |
349 |
2155 |
362 |
2145 |
925 |
2123 |
837 |
704 |
780 |
863 |
2061 |
937 |
2093 |
420 |
2137 |
271 |
293 |
| 11 |
29 |
9 |
107 |
1904 |
1450 |
1867 |
1365 |
1832 |
1216 |
1294 |
1758 |
1307 |
1885 |
1438 |
1956 |
81 |
71 |
105 |
| 12 |
404 |
969 |
316 |
819 |
285 |
716 |
2107 |
2083 |
2082 |
2156 |
2101 |
2185 |
768 |
227 |
881 |
304 |
893 |
378 |
| 13 |
1405 |
65 |
1299 |
61 |
1264 |
27 |
1821 |
1968 |
1907 |
1845 |
1892 |
1769 |
53 |
1246 |
73 |
1373 |
123 |
1483 |
| 14 |
859 |
779 |
957 |
2131 |
422 |
2090 |
272 |
2140 |
269 |
243 |
2152 |
348 |
2148 |
360 |
2053 |
905 |
705 |
841 |
| 15 |
1286 |
1310 |
1757 |
1435 |
1889 |
131 |
1936 |
106 |
69 |
11 |
28 |
1924 |
57 |
1863 |
1453 |
1833 |
1362 |
1224 |
| 16 |
2098 |
2106 |
771 |
2184 |
811 |
225 |
894 |
284 |
400 |
382 |
336 |
968 |
287 |
889 |
2108 |
713 |
2132 |
2086 |
| 17 |
1905 |
1789 |
1891 |
1242 |
3 |
1374 |
76 |
1413 |
120 |
68 |
1475 |
58 |
1298 |
77 |
1268 |
1969 |
1801 |
1847 |
| 18 |
2172 |
247 |
2150 |
347 |
2054 |
430 |
755 |
902 |
856 |
844 |
960 |
729 |
352 |
2130 |
273 |
2088 |
265 |
2120 |
- 18*18
- Min=1; Max=2185;
- that the sum of the entries of any row, any column, or any pan
diagonal is the same. C1= 19 674 ;
- that square sum of the entries of any row, any column, or any
pan diagonal is the same.C2= 31 866 762 ;
- that the cube sum of the entries of any main and fan diagonal
is the same.C3= 57 484 063 746 ;
|
16
|
234
|
250
|
141
|
6
|
183
|
253
|
119
|
1
|
26
|
247
|
132
|
11
|
71
|
244
|
122
|
|
104
|
25
|
101
|
120
|
57
|
184
|
60
|
142
|
152
|
233
|
149
|
121
|
201
|
72
|
204
|
131
|
|
150
|
22
|
106
|
48
|
59
|
75
|
199
|
219
|
102
|
230
|
154
|
33
|
203
|
187
|
55
|
214
|
|
168
|
229
|
162
|
37
|
94
|
76
|
85
|
210
|
169
|
21
|
175
|
44
|
83
|
188
|
92
|
223
|
|
81
|
237
|
87
|
212
|
171
|
68
|
164
|
39
|
96
|
29
|
90
|
221
|
166
|
180
|
173
|
42
|
|
99
|
30
|
159
|
217
|
206
|
67
|
50
|
46
|
147
|
238
|
111
|
216
|
62
|
179
|
194
|
35
|
|
145
|
17
|
148
|
129
|
208
|
192
|
205
|
123
|
97
|
225
|
100
|
144
|
64
|
80
|
61
|
118
|
|
249
|
226
|
15
|
124
|
243
|
191
|
12
|
130
|
248
|
18
|
2
|
117
|
254
|
79
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