A171509 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 3 | | 1 |
| | | | | | | | 10 | | 6 | | 1 |
| | | | | | | 33 | | 29 | | 9 | | 1 |
| | | | | | 110 | | 126 | | 57 | | 12 | | 1 |
| | | | | 366 | | 518 | | 306 | | 94 | | 15 | | 1 |
| | | | 1220 | | 2052 | | 1494 | | 600 | | 140 | | 18 | | 1 |
| | | 4065 | | 7925 | | 6849 | | 3389 | | 1035 | | 195 | | 21 | | 1 |
| | 13550 | | 30030 | | 30025 | | 17628 | | 6635 | | 1638 | | 259 | | 24 | | 1 |
|
A171509 as a square array
| 1 | 3 | 10 | 33 | 110 | 366 | 1220 | 4065 | 13550
| | 1 | 6 | 29 | 126 | 518 | 2052 | 7925 | 30030
| | 1 | 9 | 57 | 306 | 1494 | 6849 | 30025
| | 1 | 12 | 94 | 600 | 3389 | 17628
| | 1 | 15 | 140 | 1035 | 6635
| | 1 | 18 | 195 | 1638
| | 1 | 21 | 259
| | 1 | 24
| | 1
|
A171509 as an upper right triangle
| 1 | 3 | 10 | 33 | 110 | 366 | 1220 | 4065 | 13550
| | 1 | 6 | 29 | 126 | 518 | 2052 | 7925 | 30030
| | | 1 | 9 | 57 | 306 | 1494 | 6849 | 30025
| | | | 1 | 12 | 94 | 600 | 3389 | 17628
| | | | | 1 | 15 | 140 | 1035 | 6635
| | | | | | 1 | 18 | 195 | 1638
| | | | | | | 1 | 21 | 259
| | | | | | | | 1 | 24
| | | | | | | | | 1
|
|
