数组的前几行:
1, 1, 1, 1, 1, 1, ...
1, 2, 4, 8, 16, 32, ...
1, 4, 11, 28, 71, 184, ...
1, 8, 28, 87, 266, 823, ...
1, 16, 71, 266, 952, 3381, ...
...
三角形的前几行:
1;
1, 1;
1, 2, 1;
1, 4, 4, 1;
1, 8, 11, 8, 1;
1, 16, 28, 28, 16, 1;
1, 32, 71, 87, 71, 32, 1;
1, 64, 184, 266, 266, 184, 64, 1;
1, 128, 491, 823, 952, 823, 491, 128, 1;
...