A290307 as a triangular array
| | | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | | 1 | | 0 |
| | | | | | | | | | | | | 1 | | 1 | | 0 |
| | | | | | | | | | | | 1 | | 1 | | 0 | | 0 |
| | | | | | | | | | | 1 | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | | | 1 | | 1 | | 1 | | 1 | | 1 | | 0 |
| | | | | | | | | 1 | | 1 | | 1 | | 2 | | 1 | | 1 | | 0 |
| | | | | | | | 1 | | 1 | | 1 | | 2 | | 1 | | 2 | | 1 | | 0 |
| | | | | | | 1 | | 1 | | 1 | | 2 | | 2 | | 2 | | 2 | | 1 | | 0 |
| | | | | | 1 | | 1 | | 1 | | 2 | | 2 | | 2 | | 3 | | 3 | | 2 | | 0 |
| | | | | 1 | | 1 | | 1 | | 2 | | 2 | | 3 | | 3 | | 3 | | 3 | | 2 | | 0 |
| | | | 1 | | 1 | | 1 | | 2 | | 2 | | 3 | | 3 | | 4 | | 4 | | 3 | | 2 | | 0 |
| | | 1 | | 1 | | 1 | | 2 | | 2 | | 3 | | 4 | | 4 | | 4 | | 5 | | 4 | | 2 | | 0 |
| | 1 | | 1 | | 1 | | 2 | | 2 | | 3 | | 4 | | 4 | | 5 | | 6 | | 6 | | 5 | | 3 | | 0 |
|
A290307 as a square array
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | 0 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2
| | 0 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 3
| | 0 | 1 | 2 | 3 | 3 | 3 | 4 | 4
| | 0 | 1 | 3 | 3 | 4 | 4 | 4
| | 0 | 2 | 3 | 4 | 4 | 5
| | 0 | 2 | 3 | 5 | 6
| | 0 | 2 | 4 | 6
| | 0 | 2 | 5
| | 0 | 3
| | 0
|
A290307 as an upper right triangle
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | | | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
| | | | | 0 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2
| | | | | | 0 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 3
| | | | | | | 0 | 1 | 2 | 3 | 3 | 3 | 4 | 4
| | | | | | | | 0 | 1 | 3 | 3 | 4 | 4 | 4
| | | | | | | | | 0 | 2 | 3 | 4 | 4 | 5
| | | | | | | | | | 0 | 2 | 3 | 5 | 6
| | | | | | | | | | | 0 | 2 | 4 | 6
| | | | | | | | | | | | 0 | 2 | 5
| | | | | | | | | | | | | 0 | 3
| | | | | | | | | | | | | | 0
|
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