A071921 formatted as a triangular array:
| | | | | | | | | | 1 | | | | | | | | | | |
| | | | | | | | | 1 | | 0 | | | | | | | | | |
| | | | | | | | 1 | | 1 | | 0 | | | | | | | | |
| | | | | | | 1 | | 2 | | 1 | | 0 | | | | | | | |
| | | | | | 1 | | 3 | | 4 | | 1 | | 0 | | | | | | |
| | | | | 1 | | 4 | | 9 | | 7 | | 1 | | 0 | | | | | |
| | | | 1 | | 5 | | 16 | | 22 | | 11 | | 1 | | 0 | | | | |
| | | 1 | | 6 | | 25 | | 50 | | 46 | | 16 | | 1 | | 0 | | | |
| | 1 | | 7 | | 36 | | 95 | | 130 | | 86 | | 22 | | 1 | | 0 | | |
| 1 | | 8 | | 49 | | 161 | | 295 | | 296 | | 148 | | 29 | | 1 | | 0 | |
| 1 | | 9 | | 64 | | 252 | | 581 | | 791 | | 610 | | 239 | | 37 | | 1 | | 0 |
A071921 formatted as a square array:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| 0 | 1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 | | |
| 0 | 1 | 7 | 22 | 50 | 95 | 161 | 252 | | | |
| 0 | 1 | 11 | 46 | 130 | 295 | 581 | | | | |
| 0 | 1 | 16 | 86 | 296 | 791 | | | | | |
| 0 | 1 | 22 | 148 | 610 | | | | | | |
| 0 | 1 | 29 | 239 | | | | | | | |
| 0 | 1 | 37 | | | | | | | | |
| 0 | 1 | | | | | | | | | |
| 0 | | | | | | | | | | |
A071921 formatted as an upper right triangle:
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| | 0 | 1 | 4 | 9 | 16 | 25 | 36 | 49 | 64 |
| | | 0 | 1 | 7 | 22 | 50 | 95 | 161 | 252 |
| | | | 0 | 1 | 11 | 46 | 130 | 295 | 581 |
| | | | | 0 | 1 | 16 | 86 | 296 | 791 |
| | | | | | 0 | 1 | 22 | 148 | 610 |
| | | | | | | 0 | 1 | 29 | 239 |
| | | | | | | | 0 | 1 | 37 |
| | | | | | | | | 0 | 1 |
| | | | | | | | | | 0 |
|
