A181169 as a triangular array
| | | | | | | | | | | | | 0 |
| | | | | | | | | | | | | 0 | | 0 |
| | | | | | | | | | | | 0 | | 1 | | 0 |
| | | | | | | | | | | 0 | | 1 | | 1 | | 0 |
| | | | | | | | | | 0 | | 2 | | 2 | | 1 | | 0 |
| | | | | | | | | 0 | | 2 | | 1 | | 2 | | 1 | | 0 |
| | | | | | | | 0 | | 3 | | 3 | | 3 | | 3 | | 1 | | 0 |
| | | | | | | 0 | | 3 | | 3 | | 4 | | 3 | | 3 | | 1 | | 0 |
| | | | | | 0 | | 4 | | 3 | | 6 | | 6 | | 3 | | 4 | | 1 | | 0 |
| | | | | 0 | | 4 | | 4 | | 8 | | 5 | | 8 | | 4 | | 4 | | 1 | | 0 |
| | | | 0 | | 5 | | 5 | | 10 | | 10 | | 10 | | 10 | | 5 | | 5 | | 1 | | 0 |
| | | 0 | | 5 | | 4 | | 12 | | 10 | | 17 | | 10 | | 12 | | 4 | | 5 | | 1 | | 0 |
| | 0 | | 6 | | 6 | | 15 | | 15 | | 20 | | 20 | | 15 | | 15 | | 6 | | 6 | | 1 | | 0 |
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A181169 as a square array
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| 0 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6
| 0 | 1 | 2 | 1 | 3 | 3 | 3 | 4 | 5 | 4 | 6
| 0 | 1 | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 15
| 0 | 1 | 3 | 3 | 6 | 5 | 10 | 10 | 15
| 0 | 1 | 3 | 3 | 8 | 10 | 17 | 20
| 0 | 1 | 4 | 4 | 10 | 10 | 20
| 0 | 1 | 4 | 5 | 12 | 15
| 0 | 1 | 5 | 4 | 15
| 0 | 1 | 5 | 6
| 0 | 1 | 6
| 0 | 1
| 0
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A181169 as an upper right triangle
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
| | 0 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6
| | | 0 | 1 | 2 | 1 | 3 | 3 | 3 | 4 | 5 | 4 | 6
| | | | 0 | 1 | 2 | 3 | 4 | 6 | 8 | 10 | 12 | 15
| | | | | 0 | 1 | 3 | 3 | 6 | 5 | 10 | 10 | 15
| | | | | | 0 | 1 | 3 | 3 | 8 | 10 | 17 | 20
| | | | | | | 0 | 1 | 4 | 4 | 10 | 10 | 20
| | | | | | | | 0 | 1 | 4 | 5 | 12 | 15
| | | | | | | | | 0 | 1 | 5 | 4 | 15
| | | | | | | | | | 0 | 1 | 5 | 6
| | | | | | | | | | | 0 | 1 | 6
| | | | | | | | | | | | 0 | 1
| | | | | | | | | | | | | 0
|
|