A099020 formatted as a triangular array:
| | | | | | | | | 1 | | | | | | | | | |
| | | | | | | | 1 | | 0 | | | | | | | | |
| | | | | | | 2 | | 1 | | 1 | | | | | | | |
| | | | | | 4 | | 2 | | 1 | | 0 | | | | | | |
| | | | | 10 | | 6 | | 4 | | 3 | | 3 | | | | | |
| | | | 26 | | 16 | | 10 | | 6 | | 3 | | 0 | | | | |
| | | 76 | | 50 | | 34 | | 24 | | 18 | | 15 | | 15 | | | |
| | 232 | | 156 | | 106 | | 72 | | 48 | | 30 | | 15 | | 0 | | |
| 764 | | 532 | | 376 | | 270 | | 198 | | 150 | | 120 | | 105 | | 105 | |
| 2620 | | 1856 | | 1324 | | 948 | | 678 | | 480 | | 330 | | 210 | | 105 | | 0 |
A099020 formatted as a square array:
| 1 | 1 | 2 | 4 | 10 | 26 | 76 | 232 | 764 | 2620 |
| 0 | 1 | 2 | 6 | 16 | 50 | 156 | 532 | 1856 | |
| 1 | 1 | 4 | 10 | 34 | 106 | 376 | 1324 | | |
| 0 | 3 | 6 | 24 | 72 | 270 | 948 | | | |
| 3 | 3 | 18 | 48 | 198 | 678 | | | | |
| 0 | 15 | 30 | 150 | 480 | | | | | |
| 15 | 15 | 120 | 330 | | | | | | |
| 0 | 105 | 210 | | | | | | | |
| 105 | 105 | | | | | | | | |
| 0 | | | | | | | | | |
A099020 formatted as an upper right triangle:
| 1 | 1 | 2 | 4 | 10 | 26 | 76 | 232 | 764 | 2620 |
| 0 | 1 | 2 | 6 | 16 | 50 | 156 | 532 | 1856 |
| | 1 | 1 | 4 | 10 | 34 | 106 | 376 | 1324 |
| | | 0 | 3 | 6 | 24 | 72 | 270 | 948 |
| | | | 3 | 3 | 18 | 48 | 198 | 678 |
| | | | | 0 | 15 | 30 | 150 | 480 |
| | | | | | 15 | 15 | 120 | 330 |
| | | | | | | 0 | 105 | 210 |
| | | | | | | | 105 | 105 |
| | | | | | | | | 0 |
|