三角形开头为:
1;
1, 1;
1, 6, 1;
1, 16, 26, 1;
1, 36, 116, 106, 1;
1, 76, 376, 676, 426, 1;
1, 156, 1056, 2856, 3556, 1706, 1;
1, 316, 2736, 9936, 18536, 17636, 6826, 1;
1, 636, 6736, 30816, 76816, 109416, 84196, 27306, 1;
1, 1276, 16016, 88576, 276896, 526096, 606056, 391396, 109226, 1;