数组的左上角:
1, 2, 4, 6, 8, 10, 12, 14, 16, 18
3, 5, 11, 17, 23, 29, 35, 41, 47, 53
7, 9, 21, 33, 45, 57, 69, 81, 93, 105
13, 15, 37, 55, 75, 97, 115, 135, 157, 175
19, 25, 51, 85, 111, 145, 171, 205, 231, 265
27, 31, 73, 121, 159, 199, 243, 283, 327, 367
39, 43, 99, 151, 211, 267, 319, 379, 433, 487
49, 61, 127, 193, 271, 343, 421, 483, 559, 631
63, 67, 163, 247, 339, 427, 519, 607, 691, 793
79, 87, 187, 303, 403, 523, 639, 739, 853, 963