A181552 as a triangular array
| | | | | | | | | | | | 1 |
| | | | | | | | | | | | 1 | | 6 |
| | | | | | | | | | | 1 | | 3 | | 12 |
| | | | | | | | | | 1 | | 6 | | 4 | | 20 |
| | | | | | | | | 1 | | 3 | | 4 | | 5 | | 30 |
| | | | | | | | 1 | | 6 | | 12 | | 10 | | 6 | | 72 |
| | | | | | | 1 | | 3 | | 4 | | 5 | | 6 | | 12 | | 56 |
| | | | | | 1 | | 6 | | 4 | | 20 | | 6 | | 24 | | 8 | | 80 |
| | | | | 1 | | 3 | | 12 | | 5 | | 6 | | 36 | | 8 | | 10 | | 99 |
| | | | 1 | | 6 | | 4 | | 10 | | 30 | | 24 | | 8 | | 20 | | 11 | | 180 |
| | | 1 | | 3 | | 4 | | 5 | | 6 | | 12 | | 8 | | 10 | | 11 | | 18 | | 132 |
| | 1 | | 6 | | 12 | | 20 | | 6 | | 72 | | 8 | | 40 | | 33 | | 36 | | 12 | | 240 |
|
A181552 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 6 | 3 | 6 | 3 | 6 | 3 | 6 | 3 | 6 | 3 | 6
| | 12 | 4 | 4 | 12 | 4 | 4 | 12 | 4 | 4 | 12
| | 20 | 5 | 10 | 5 | 20 | 5 | 10 | 5 | 20
| | 30 | 6 | 6 | 6 | 6 | 30 | 6 | 6
| | 72 | 12 | 24 | 36 | 24 | 12 | 72
| | 56 | 8 | 8 | 8 | 8 | 8
| | 80 | 10 | 20 | 10 | 40
| | 99 | 11 | 11 | 33
| | 180 | 18 | 36
| | 132 | 12
| | 240
|
A181552 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 6 | 3 | 6 | 3 | 6 | 3 | 6 | 3 | 6 | 3 | 6
| | | 12 | 4 | 4 | 12 | 4 | 4 | 12 | 4 | 4 | 12
| | | | 20 | 5 | 10 | 5 | 20 | 5 | 10 | 5 | 20
| | | | | 30 | 6 | 6 | 6 | 6 | 30 | 6 | 6
| | | | | | 72 | 12 | 24 | 36 | 24 | 12 | 72
| | | | | | | 56 | 8 | 8 | 8 | 8 | 8
| | | | | | | | 80 | 10 | 20 | 10 | 40
| | | | | | | | | 99 | 11 | 11 | 33
| | | | | | | | | | 180 | 18 | 36
| | | | | | | | | | | 132 | 12
| | | | | | | | | | | | 240
|
|
