A165621 as a triangular array
| | | | | | | | | | | 1 |
| | | | | | | | | | | 1 | | 1 |
| | | | | | | | | | 1 | | 1 | | 1 |
| | | | | | | | | 2 | | 2 | | 1 | | 1 |
| | | | | | | | 2 | | 3 | | 3 | | 1 | | 1 |
| | | | | | | 5 | | 5 | | 4 | | 4 | | 1 | | 1 |
| | | | | | 5 | | 9 | | 9 | | 5 | | 5 | | 1 | | 1 |
| | | | | 14 | | 14 | | 14 | | 14 | | 6 | | 6 | | 1 | | 1 |
| | | | 14 | | 28 | | 28 | | 20 | | 20 | | 7 | | 7 | | 1 | | 1 |
| | | 42 | | 42 | | 48 | | 48 | | 27 | | 27 | | 8 | | 8 | | 1 | | 1 |
| | 42 | | 90 | | 90 | | 75 | | 75 | | 35 | | 35 | | 9 | | 9 | | 1 | | 1 |
|
A165621 as a square array
| 1 | 1 | 1 | 2 | 2 | 5 | 5 | 14 | 14 | 42 | 42
| | 1 | 1 | 2 | 3 | 5 | 9 | 14 | 28 | 42 | 90
| | 1 | 1 | 3 | 4 | 9 | 14 | 28 | 48 | 90
| | 1 | 1 | 4 | 5 | 14 | 20 | 48 | 75
| | 1 | 1 | 5 | 6 | 20 | 27 | 75
| | 1 | 1 | 6 | 7 | 27 | 35
| | 1 | 1 | 7 | 8 | 35
| | 1 | 1 | 8 | 9
| | 1 | 1 | 9
| | 1 | 1
| | 1
|
A165621 as an upper right triangle
| 1 | 1 | 1 | 2 | 2 | 5 | 5 | 14 | 14 | 42 | 42
| | 1 | 1 | 2 | 3 | 5 | 9 | 14 | 28 | 42 | 90
| | | 1 | 1 | 3 | 4 | 9 | 14 | 28 | 48 | 90
| | | | 1 | 1 | 4 | 5 | 14 | 20 | 48 | 75
| | | | | 1 | 1 | 5 | 6 | 20 | 27 | 75
| | | | | | 1 | 1 | 6 | 7 | 27 | 35
| | | | | | | 1 | 1 | 7 | 8 | 35
| | | | | | | | 1 | 1 | 8 | 9
| | | | | | | | | 1 | 1 | 9
| | | | | | | | | | 1 | 1
| | | | | | | | | | | 1
|
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