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例子
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数组的左上角:
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26
3, 9, 15, 21, 27, 33, 39, 45, 51, 57, 63, 69, 75
5, 19, 35, 49, 65, 79, 95, 109, 125, 139, 155, 169, 185
7, 31, 59, 85, 113, 137, 163, 191, 217, 241, 269, 295, 323
11, 55, 103, 151, 203, 251, 299, 343, 391, 443, 491, 539, 587
13, 73, 133, 197, 263, 325, 385, 449, 511, 571, 641, 701, 761
17, 101, 187, 281, 367, 461, 547, 629, 721, 809, 901, 989, 1079
23, 145, 271, 403, 523, 655, 781, 911, 1037, 1157, 1289, 1417, 1543
25, 167, 311, 457, 599, 745, 883, 1033, 1181, 1321, 1469, 1615, 1753
29, 205, 371, 551, 719, 895, 1073, 1243, 1421, 1591, 1771, 1945, 2117
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