A051173 formatted as a triangular array:
| | | | | | | | | | 1 | | | | | | | | | | |
| | | | | | | | | 2 | | 2 | | | | | | | | | |
| | | | | | | | 3 | | 6 | | 3 | | | | | | | | |
| | | | | | | 4 | | 4 | | 12 | | 4 | | | | | | | |
| | | | | | 5 | | 10 | | 15 | | 20 | | 5 | | | | | | |
| | | | | 6 | | 6 | | 6 | | 12 | | 30 | | 6 | | | | | |
| | | | 7 | | 14 | | 21 | | 28 | | 35 | | 42 | | 7 | | | | |
| | | 8 | | 8 | | 24 | | 8 | | 40 | | 24 | | 56 | | 8 | | | |
| | 9 | | 18 | | 9 | | 36 | | 45 | | 18 | | 63 | | 72 | | 9 | | |
| 10 | | 10 | | 30 | | 20 | | 10 | | 30 | | 70 | | 40 | | 90 | | 10 | |
| 11 | | 22 | | 33 | | 44 | | 55 | | 66 | | 77 | | 88 | | 99 | | 110 | | 11 |
A051173 formatted as a square array:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 2 | 6 | 4 | 10 | 6 | 14 | 8 | 18 | 10 | 22 | |
| 3 | 12 | 15 | 6 | 21 | 24 | 9 | 30 | 33 | | |
| 4 | 20 | 12 | 28 | 8 | 36 | 20 | 44 | | | |
| 5 | 30 | 35 | 40 | 45 | 10 | 55 | | | | |
| 6 | 42 | 24 | 18 | 30 | 66 | | | | | |
| 7 | 56 | 63 | 70 | 77 | | | | | | |
| 8 | 72 | 40 | 88 | | | | | | | |
| 9 | 90 | 99 | | | | | | | | |
| 10 | 110 | | | | | | | | | |
| 11 | | | | | | | | | | |
A051173 formatted as an upper right triangle:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 2 | 6 | 4 | 10 | 6 | 14 | 8 | 18 | 10 | 22 |
| | 3 | 12 | 15 | 6 | 21 | 24 | 9 | 30 | 33 |
| | | 4 | 20 | 12 | 28 | 8 | 36 | 20 | 44 |
| | | | 5 | 30 | 35 | 40 | 45 | 10 | 55 |
| | | | | 6 | 42 | 24 | 18 | 30 | 66 |
| | | | | | 7 | 56 | 63 | 70 | 77 |
| | | | | | | 8 | 72 | 40 | 88 |
| | | | | | | | 9 | 90 | 99 |
| | | | | | | | | 10 | 110 |
| | | | | | | | | | 11 |
|