A253407 as a triangular array
| | | | | | | | 81 |
| | | | | | | | 480 | | 480 |
| | | | | | | 2890 | | 2192 | | 2890 |
| | | | | | 17560 | | 8168 | | 8168 | | 17560 |
| | | | | 106540 | | 37828 | | 27362 | | 37828 | | 106540 |
| | | | 646240 | | 158472 | | 108950 | | 108950 | | 158472 | | 646240 |
| | | 3920448 | | 638602 | | 367348 | | 403698 | | 367348 | | 638602 | | 3920448 |
| | 23781448 | | 2763096 | | 1489310 | | 1739014 |
|
A253407 as a square array
81 | 480 | 2890 | 17560 | 106540 | 646240 | 3920448 | 23781448
| 480 | 2192 | 8168 | 37828 | 158472 | 638602 | 2763096
| 2890 | 8168 | 27362 | 108950 | 367348 | 1489310
| 17560 | 37828 | 108950 | 403698 | 1739014
| 106540 | 158472 | 367348
| 646240 | 638602
| 3920448
|
A253407 as an upper right triangle
81 | 480 | 2890 | 17560 | 106540 | 646240 | 3920448 | 23781448
| | 480 | 2192 | 8168 | 37828 | 158472 | 638602 | 2763096
| | | 2890 | 8168 | 27362 | 108950 | 367348 | 1489310
| | | | 17560 | 37828 | 108950 | 403698 | 1739014
| | | | | 106540 | 158472 | 367348
| | | | | | 646240 | 638602
| | | | | | | 3920448
| | | | | | |
|
|