三角形开始:
1;
1, 2;
1, 4;
1, 7, 2;
1, 10, 8, 2;
1, 14, 19, 11;
1, 18, 40, 48, 7;
1, 23, 77, 154, 70, 5;
1, 28, 132, 421, 392, 71;
1, 34, 217, 1008, 1638, 690, 35;
1, 40, 340, 2210, 5623, 4548, 767, 16;
1, 47, 510, 4477, 16745, 22657, 8594, 566;
1, 54, 742, 8557, 44698, 92844, 64716, 11247, 226;
...