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例子
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数组开头为:
1, 3, 20, 140, 1449, 15939, 226512 ...;
3, 12, 75, 588, 5859, 68904, 953667 ...;
20, 75, 495, 3780, 38880, 449955, 6364215 ...;
140, 588, 3780, 30240, 306180, 3645180, 50990940 ...;
1449, 5859, 38880, 306180, 3161025, 37266075, 528500700 ...;
15939, 68904, 449955, 3645180, 37266075, 447192900, 6297966675 ...;
226512, 953667, 6364215, 50990940, 528500700, 6297966675, 89576261775 ...;
三角形开头为:
1;
3, 3;
20, 12, 20;
140, 75, 75, 140;
1449, 588, 495, 588, 1449;
15939, 5859, 3780, 3780, 5859, 15939;
226512, 68904, 38880, 30240, 38880, 68904, 226512;
3397680, 953667, 449955, 306180, 306180, 449955, 953667, 3397680;
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