A090806 as a triangular array
| | | | | | | | | | | | | 1 |
| | | | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | | | 1 | | 2 | | 1 |
| | | | | | | | | | | 1 | | 2 | | 2 | | 1 |
| | | | | | | | | | 1 | | 3 | | 4 | | 3 | | 1 |
| | | | | | | | | 1 | | 3 | | 5 | | 5 | | 3 | | 1 |
| | | | | | | | 1 | | 4 | | 7 | | 9 | | 7 | | 4 | | 1 |
| | | | | | | 1 | | 4 | | 9 | | 12 | | 12 | | 9 | | 4 | | 1 |
| | | | | | 1 | | 5 | | 11 | | 17 | | 20 | | 17 | | 11 | | 5 | | 1 |
| | | | | 1 | | 5 | | 13 | | 22 | | 28 | | 28 | | 22 | | 13 | | 5 | | 1 |
| | | | 1 | | 6 | | 16 | | 29 | | 40 | | 45 | | 40 | | 29 | | 16 | | 6 | | 1 |
| | | 1 | | 6 | | 18 | | 35 | | 53 | | 64 | | 64 | | 53 | | 35 | | 18 | | 6 | | 1 |
| | 1 | | 7 | | 21 | | 44 | | 70 | | 91 | | 100 | | 91 |
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A090806 as a square array
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7
| 1 | 2 | 4 | 5 | 7 | 9 | 11 | 13 | 16 | 18 | 21
| 1 | 3 | 5 | 9 | 12 | 17 | 22 | 29 | 35 | 44
| 1 | 3 | 7 | 12 | 20 | 28 | 40 | 53 | 70
| 1 | 4 | 9 | 17 | 28 | 45 | 64 | 91
| 1 | 4 | 11 | 22 | 40 | 64 | 100
| 1 | 5 | 13 | 29 | 53 | 91
| 1 | 5 | 16 | 35
| 1 | 6 | 18
| 1 | 6
| 1
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A090806 as an upper right triangle
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
| | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7
| | | 1 | 2 | 4 | 5 | 7 | 9 | 11 | 13 | 16 | 18 | 21
| | | | 1 | 3 | 5 | 9 | 12 | 17 | 22 | 29 | 35 | 44
| | | | | 1 | 3 | 7 | 12 | 20 | 28 | 40 | 53 | 70
| | | | | | 1 | 4 | 9 | 17 | 28 | 45 | 64 | 91
| | | | | | | 1 | 4 | 11 | 22 | 40 | 64 | 100
| | | | | | | | 1 | 5 | 13 | 29 | 53 | 91
| | | | | | | | | 1 | 5 | 16 | 35
| | | | | | | | | | 1 | 6 | 18
| | | | | | | | | | | 1 | 6
| | | | | | | | | | | | 1
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