A280554 as a triangular array
| | | | | | | | | | | 0 |
| | | | | | | | | | | 0 | | 0 |
| | | | | | | | | | 0 | | 0 | | 0 |
| | | | | | | | | 1 | | 9 | | 9 | | 1 |
| | | | | | | | 2 | | 34 | | 50 | | 34 | | 2 |
| | | | | | | 6 | | 87 | | 144 | | 144 | | 87 | | 6 |
| | | | | | 13 | | 194 | | 325 | | 382 | | 325 | | 194 | | 13 |
| | | | | 29 | | 400 | | 670 | | 832 | | 832 | | 670 | | 400 | | 29 |
| | | | 60 | | 790 | | 1316 | | 1666 | | 1764 | | 1666 | | 1316 | | 790 | | 60 |
| | | 122 | | 1511 | | 2502 | | 3182 | | 3438 | | 3438 | | 3182 | | 2502 | | 1511 | | 122 |
| | 241 | | 2830 | | 4654 |
|
A280554 as a square array
0 | 0 | 0 | 1 | 2 | 6 | 13 | 29 | 60 | 122 | 241
| 0 | 0 | 9 | 34 | 87 | 194 | 400 | 790 | 1511 | 2830
| 0 | 9 | 50 | 144 | 325 | 670 | 1316 | 2502 | 4654
| 1 | 34 | 144 | 382 | 832 | 1666 | 3182
| 2 | 87 | 325 | 832 | 1764 | 3438
| 6 | 194 | 670 | 1666 | 3438
| 13 | 400 | 1316 | 3182
| 29 | 790 | 2502
| 60 | 1511
| 122
|
A280554 as an upper right triangle
0 | 0 | 0 | 1 | 2 | 6 | 13 | 29 | 60 | 122 | 241
| | 0 | 0 | 9 | 34 | 87 | 194 | 400 | 790 | 1511 | 2830
| | | 0 | 9 | 50 | 144 | 325 | 670 | 1316 | 2502 | 4654
| | | | 1 | 34 | 144 | 382 | 832 | 1666 | 3182
| | | | | 2 | 87 | 325 | 832 | 1764 | 3438
| | | | | | 6 | 194 | 670 | 1666 | 3438
| | | | | | | 13 | 400 | 1316 | 3182
| | | | | | | | 29 | 790 | 2502
| | | | | | | | | 60 | 1511
| | | | | | | | | | 122
| | | | | | | | | |
|
|