方形数组开始:
1, 1, 1, 1, 1, 1, 1, 1, 1, ...
1, 1, 2, 2, 2, 2, 2, 2, 2, ...
1, 1, 3, 3, 4, 4, 4, 4, 4, ...
1, 1, 4, 5, 7, 7, 7, 7, 8, ...
1, 1, 5, 8, 12, 12, 12, 13, 15, ...
1, 1, 6, 13, 20, 21, 20, 24, 28, ...
1, 1, 7, 21, 33, 37, 33, 44, 52, ...
1, 1, 8, 34, 54, 65, 54, 81, 96, ...
1, 1, 9, 55, 88, 114, 88, 149, 177, ...